rule: Support Endgame N-Move rule

TODO: Translation

src/mills.cpp

@@ -29,6 +29,7 @@ const char *loseReasonNoWayStr = "Player%d no way to go. Player%d win!";
 const char *loseReasonTimeOverStr = "Time over. Player%d win!";
 const char *drawReasonThreefoldRepetitionStr = "Threefold Repetition. Draw!";
 const char *drawReasonRule50Str = "N-move rule. Draw!";
+const char *drawReasonEndgameRule50Str = "Endgame N-move rule. Draw!";
 const char *loseReasonBoardIsFullStr = "Full. Player2 win!";
 const char *drawReasonBoardIsFullStr = "Full. In draw!";
 const char *loseReasonlessThanThreeStr = "Player%d win!";

src/mills.h

@@ -26,6 +26,7 @@ extern const char *loseReasonNoWayStr;
 extern const char *loseReasonTimeOverStr;
 extern const char *drawReasonThreefoldRepetitionStr;
 extern const char *drawReasonRule50Str;
+extern const char *drawReasonEndgameRule50Str;
 extern const char *loseReasonBoardIsFullStr;
 extern const char *drawReasonBoardIsFullStr;
 extern const char *loseReasonlessThanThreeStr;

src/position.cpp

@@ -1014,6 +1014,13 @@ bool Position::check_if_game_is_over()
         set_gameover(DRAW, GameOverReason::drawReasonRule50);
         return true;
     }
+
+    if (rule.endgameNMoveRule < rule.nMoveRule &&
+        is_three_endgame() &&
+        posKeyHistory.size() > rule.endgameNMoveRule) {
+        set_gameover(DRAW, GameOverReason::drawReasonEndgameRule50);
+        return true;
+    }
 #endif // RULE_50
 
     if (pieceOnBoardCount[WHITE] + pieceOnBoardCount[BLACK] >= EFFECTIVE_SQUARE_NB) {

src/position.h

@@ -150,6 +150,8 @@ public:
     //template <typename Mt> void updateMobility(Square from, Square to);
     int calculate_mobility_diff();
 
+    bool is_three_endgame() const;
+
     static bool is_star_square(Square s);
 
     bool bitboard_is_ok();
@@ -353,4 +355,13 @@ inline int Position::get_mobility_diff() const
     return mobilityDiff;
 }
 
+inline bool Position::is_three_endgame() const
+{
+    if (get_phase() == Phase::placing) {
+        return false;
+    }
+
+    return pieceOnBoardCount[WHITE] == 3 || pieceOnBoardCount[BLACK] == 3;
+}
+
 #endif // #ifndef POSITION_H_INCLUDED

src/rule.h

@@ -74,6 +74,9 @@ struct Rule
 
     // The N-move rule in Mill states that if no remove has been made in the last N moves.
     unsigned int nMoveRule;
+
+    // If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.
+    unsigned int endgameNMoveRule;
 };
 
 #define N_RULES 5

src/search.cpp

@@ -100,6 +100,12 @@ int Thread::search()
         if (posKeyHistory.size() > rule.nMoveRule) {
             return 50;
         }
+
+        if (rule.endgameNMoveRule < rule.nMoveRule &&
+            rootPos->is_three_endgame() && 
+            posKeyHistory.size() > rule.endgameNMoveRule) {
+            return 10;
+        }
 #endif // RULE_50
 
 #ifdef THREEFOLD_REPETITION
@@ -221,7 +227,10 @@ Value qsearch(Position *pos, Sanmill::Stack<Position> &ss, Depth depth, Depth or
     Depth epsilon;
 
 #ifdef RULE_50
-    if (pos->rule50_count() > rule.nMoveRule) {
+    if ((pos->rule50_count() > rule.nMoveRule) ||
+        (rule.endgameNMoveRule < rule.nMoveRule &&
+         pos->is_three_endgame() && 
+         pos->rule50_count() > rule.endgameNMoveRule)) {
         alpha = VALUE_DRAW;
         if (alpha >= beta) {
             return alpha;

src/thread.cpp

@@ -157,7 +157,7 @@ void Thread::idle_loop()
 #endif
                 int ret = search();
 
-                if (ret == 3 || ret == 50) {
+                if (ret == 3 || ret == 50 || ret == 10) {
                     loggerDebug("Draw\n\n");
                     strCommand = "draw";
                     emitCommand();

src/types.h

@@ -181,6 +181,7 @@ enum class GameOverReason
     loseReasonTimeOver,
     drawReasonThreefoldRepetition,
     drawReasonRule50,
+    drawReasonEndgameRule50,
     drawReasonBoardIsFull,
 };
 

src/ucioption.cpp

@@ -167,6 +167,11 @@ void on_nMoveRule(const Option &o)
     rule.nMoveRule = (unsigned int)o;
 }
 
+void on_endgameNMoveRule(const Option &o)
+{
+    rule.endgameNMoveRule = (unsigned int)o;
+}
+
 /// Our case insensitive less() function as required by UCI protocol
 bool CaseInsensitiveLess::operator() (const string &s1, const string &s2) const
 {
@@ -221,6 +226,7 @@ void init(OptionsMap &o)
     o["IsLoseButNotChangeSideWhenNoWay"] << Option(true, on_isLoseButNotChangeSideWhenNoWay);
     o["MayFly"] << Option(true, on_mayFly);
     o["NMoveRule"] << Option(100, 10, 200, on_nMoveRule);
+    o["EndgameNMoveRule"] << Option(100, 5, 200, on_endgameNMoveRule);
 }
 
 

src/ui/flutter_app/lib/common/config.dart

@@ -97,6 +97,7 @@ class Config {
   static bool isLoseButNotChangeSideWhenNoWay = true;
   static bool mayFly = true;
   static int nMoveRule = 100;
+  static int endgameNMoveRule = 100;
 
   static Future<void> loadSettings() async {
     print("[config] Loading settings...");
@@ -207,6 +208,7 @@ class Config {
             settings['IsLoseButNotChangeSideWhenNoWay'] ?? true;
     rule.mayFly = Config.mayFly = settings['MayFly'] ?? true;
     rule.nMoveRule = Config.nMoveRule = settings['NMoveRule'] ?? 100;
+    rule.endgameNMoveRule = Config.endgameNMoveRule = settings['EndgameNMoveRule'] ?? 100;
 
     settingsLoaded = true;
     print("[config] Loading settings done!");
@@ -287,6 +289,7 @@ class Config {
         Config.isLoseButNotChangeSideWhenNoWay;
     settings['MayFly'] = Config.mayFly;
     settings['NMoveRule'] = Config.nMoveRule;
+    settings['EndgameNMoveRule'] = Config.endgameNMoveRule;
 
     settings.commit();
 

src/ui/flutter_app/lib/engine/native_engine.dart

@@ -172,6 +172,8 @@ class NativeEngine extends Engine {
         'setoption name IsLoseButNotChangeSideWhenNoWay value ${Config.isLoseButNotChangeSideWhenNoWay}');
     await send('setoption name MayFly value ${Config.mayFly}');
     await send('setoption name NMoveRule value ${Config.nMoveRule}');
+    await send(
+        'setoption name EndgameNMoveRule value ${Config.endgameNMoveRule}');
   }
 
   String getPositionFen(Position position) {

src/ui/flutter_app/lib/l10n/intl_ar.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "إذا قام اللاعب بتشكيل الطاحونة في مرحلة التسوية ، فسوف يقوم بإزالة القطعة غير الموضوعة للخصم ويستمر في التحرك.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_bg.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Ако играч формира мелницата във фазата на поставяне, тя ще премахне непоставената фигура на противника и ще продължи да прави ход.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_bn.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "যদি প্লেয়ার প্লেসিং পর্যায়ে মিল গঠন করে, সে প্রতিপক্ষের স্থানহীন টুকরাটি সরিয়ে দেবে এবং একটি পদক্ষেপ নিতে থাকবে।",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_cs.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Pokud hráč vytvoří mlýn ve fázi umisťování, odstraní soupeřovu neumístěnou figurku a pokračuje v tahu.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_da.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Hvis en spiller danner møllen i placeringsfasen, vil hun fjerne modstanderens uplacerede brik og fortsætte med at foretage et træk.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_de.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Wenn ein Spieler in der Platzierungsphase die Mühle bildet, entfernt er den nicht platzierten Stein des Gegners und macht weiter seinen Zug.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_de_ch.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Wenn ein Spieler in der Platzierungsphase die Mühle bildet, entfernt er den nicht platzierten Stein des Gegners und macht weiter seinen Zug.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_el.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Εάν ένας παίκτης σχηματίσει το μύλο στη φάση τοποθέτησης, θα αφαιρέσει το μη τοποθετημένο κομμάτι του αντιπάλου και θα συνεχίσει να κάνει μια κίνηση.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_en.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_es.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Si un jugador forma el molino en la fase de colocación, retirará la pieza no colocada del oponente y continuará haciendo un movimiento.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_et.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Kui mängija moodustab veski paigutamise faasis, eemaldab ta vastase asetamata tüki ja jätkab käigu tegemist.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_fa.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "اگر بازیکنی آسیاب را در مرحله قرار دادن تشکیل دهد ، مهره بدون محل حریف را برداشته و به حرکت خود ادامه می دهد.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_fi.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Jos pelaaja muodostaa myllyn sijoitusvaiheessa, hän poistaa vastustajan sijoittamattoman palan ja jatkaa siirtoa.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_fr.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Si un joueur forme le moulin lors de la phase de placement, il retirera la pièce non placée de l'adversaire et continuera à se déplacer.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_gu.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "જો કોઈ ખેલાડી પ્લેસિંગ તબક્કામાં મિલની રચના કરે છે, તો તે વિરોધીના સ્થાનાંતરિત ભાગને દૂર કરશે અને ચાલ ચાલુ રાખશે.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_hi.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "यदि कोई खिलाड़ी प्लेसिंग चरण में चक्की बनाता है, तो वह प्रतिद्वंद्वी के स्थान से हटाए गए टुकड़े को हटा देगी और एक चाल चलती रहेगी।",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_hr.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Ako igrač formira mlin u fazi postavljanja, uklonit će protivnikov nezamješten dio i nastaviti činiti potez.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_hu.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Ha egy játékos az elhelyezési szakaszban megalapítja a malmot, akkor eltávolítja az ellenfél elhelyezett darabját, és folytatja a lépést.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_id.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Jika seorang pemain membentuk penggilingan di fase penempatan, dia akan menghapus bidak lawan yang belum ditempatkan dan terus bergerak.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_it.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Se un giocatore forma il mulino nella fase di piazzamento, rimuoverà il pezzo non piazzato dell'avversario e continuerà a fare una mossa.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_ja.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "スリーカムが形成されると、対戦相手の配置されていないピースのみをキャプチャしてゲームを続行できます。",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_kn.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "ಇರಿಸುವ ಹಂತದಲ್ಲಿ ಆಟಗಾರ್ತಿಯು ಗಿರಣಿಯನ್ನು ರೂಪಿಸಿದರೆ, ಆಕೆ ಎದುರಾಳಿಯ ಸ್ಥಾನವಿಲ್ಲದ ತುಂಡನ್ನು ತೆಗೆದು ಚಲನೆಯನ್ನು ಮುಂದುವರಿಸುತ್ತಾಳೆ.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_ko.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "플레이어가 배치 단계에서 밀을 형성하면 상대의 배치되지 않은 조각을 제거하고 계속 이동합니다.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_lt.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Jei žaidėjas suformuoja malūną dėjimo stadijoje, ji pašalina priešininko nepadėtą figūrą ir toliau daro ėjimą.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_lv.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Ja spēlētājs ievieto dzirnavas ievietošanas fāzē, viņa noņem pretinieka nenovietoto gabalu un turpina gājienu.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_mk.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Ако играчот ја формира воденицата во фазата на пласман, таа ќе го отстрани непласираното парче на противничката и ќе продолжи да прави потег.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_ms.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Sekiranya pemain membentuk kilang dalam fasa penempatan, dia akan mengeluarkan bahagian lawan yang tidak ditempatkan dan terus bergerak.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_nl.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Als een speler de molen vormt in de plaatsingsfase, zal ze het niet-geplaatste stuk van de tegenstander verwijderen en doorgaan met een zet.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_nn.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Hvis en spiller danner møllen i plasseringsfasen, vil hun fjerne motstanderens uplasserte brikke og fortsette å gjøre et trekk.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_pl.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Jeśli gracz utworzy młyn w fazie układania, usunie nieumieszczony pion przeciwnika i kontynuuje ruch.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_pt.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Se um jogador formar o moinho na fase de colocação, ele removerá a peça não colocada do oponente e continuará a fazer um movimento.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_ro.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Dacă un jucător formează moara în faza de plasare, va elimina piesa neplasată a adversarului și va continua să facă o mișcare.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_ru.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Если игрок формирует мельницу в фазе размещения, он удалит неразмещенную фишку противника и продолжит движение.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_sk.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Ak hráč formuje mlyn vo fáze kladenia, odstráni súperovo neumiestnené miesto a pokračuje v ťahu.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_sl.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Če igralec v fazi postavitve oblikuje mlin, bo odstranil nasprotnikov nezameščen kos in nadaljeval s potezo.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_sq.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Nëse një lojtar formon mullirin në fazën e vendosjes, ajo do të heqë pjesën e pavendosur të kundërshtarit dhe do të vazhdojë të bëjë një lëvizje.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_sr.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Ако играч формира воденицу у фази постављања, она ће уклонити противников незамењени део и наставити да прави потез.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_sv.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Om en spelare bildar kvarnen i placeringsfasen, tar hon bort motståndarens oplacerade bit och fortsätter att göra ett drag.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_te.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "ప్లేసింగ్ ఉంచే దశలో ఒక క్రీడాకారుడు మిల్లును ఏర్పాటు చేస్తే, ఆమె ప్రత్యర్థి యొక్క అన్‌ప్లాస్డ్ భాగాన్ని తీసివేసి, ఒక కదలికను కొనసాగిస్తుంది.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_th.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "หากผู้เล่นสร้างโรงสีในขั้นตอนการวาง เธอจะถอดชิ้นส่วนที่ไม่ได้วางของคู่ต่อสู้ออกและทำการเคลื่อนไหวต่อไป",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_tr.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Bir oyuncu değirmeni yerleştirme aşamasında oluşturursa, rakibin yerleştirilmemiş taşını kaldıracak ve hamle yapmaya devam edecektir.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_uz.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Agar o'yinchi joylashtirish bosqichida tegirmonni hosil qilsa, u raqibning joylanmagan qismini olib tashlaydi va harakatni davom ettiradi.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_vi.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "Nếu một người chơi hình thành cối xay trong giai đoạn đặt, cô ấy sẽ loại bỏ quân cờ của đối thủ và tiếp tục di chuyển.",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_zh.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "当形成三连时，只能吃掉对手未摆的棋子并继续行棋。",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/l10n/intl_zh_Hant.arb

@@ -1208,5 +1208,17 @@
     "removeUnplacedPiece_Detail": "當形成三連時，只能吃掉對手未擺的棋子並繼續行棋。",
     "@removeUnplacedPiece_Detail": {
         "description": "If a player forms the mill in the placing phase, she will remove the opponent's unplaced piece and continue to make a move."
+    },
+    "endgameNMoveRule": "Endgame N-Move rule",
+    "@endgameNMoveRule": {
+        "description": "Endgame N-Move rule"
+    },
+    "endgameNMoveRule_Detail": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn.",
+    "@endgameNMoveRule_Detail": {
+        "description": "If either player has only three pieces and neither player removes a piece within a specific moves, the game is drawn."
+    },
+    "drawReasonEndgameRule50": "Either player has only three pieces and neither player removes a piece within a specific moves.",
+    "@drawReasonEndgameRule50": {
+        "description": "Either player has only three pieces and neither player removes a piece within a specific moves."
     }
 }

src/ui/flutter_app/lib/mill/position.dart

@@ -293,6 +293,10 @@ class Position {
       // TODO: WAR to judge rule50
       if (rule.nMoveRule > 0 && posKeyHistory.length > rule.nMoveRule - 1) {
         gameOverReason = GameOverReason.drawReasonRule50;
+      } else if (rule.endgameNMoveRule < rule.nMoveRule &&
+          isThreeEndgame() &&
+          posKeyHistory.length > rule.endgameNMoveRule - 1) {
+        gameOverReason = GameOverReason.drawReasonEndgameRule50;
       } else {
         gameOverReason = GameOverReason.drawReasonThreefoldRepetition;
       }
@@ -764,6 +768,15 @@ class Position {
     }
   }
 
+  bool isThreeEndgame() {
+    if (phase == Phase.placing) {
+      return false;
+    }
+
+    return pieceOnBoardCount[PieceColor.white] == 3 ||
+        pieceOnBoardCount[PieceColor.black] == 3;
+  }
+
   bool checkIfGameIsOver() {
     if (phase == Phase.ready || phase == Phase.gameOver) {
       return true;
@@ -774,6 +787,13 @@ class Position {
       return true;
     }
 
+    if (rule.endgameNMoveRule < rule.nMoveRule &&
+        isThreeEndgame() &&
+        posKeyHistory.length > rule.endgameNMoveRule) {
+      setGameOver(PieceColor.draw, GameOverReason.drawReasonEndgameRule50);
+      return true;
+    }
+
     if (pieceOnBoardCount[PieceColor.white]! +
             pieceOnBoardCount[PieceColor.black]! >=
         rankNumber * fileNumber) {

src/ui/flutter_app/lib/mill/rule.dart

@@ -35,6 +35,7 @@ class Rule {
   bool isLoseButNotChangeSideWhenNoWay = true;
   bool mayFly = true;
   int nMoveRule = 100;
+  int endgameNMoveRule = 100;
 }
 
 Rule rule = Rule();

src/ui/flutter_app/lib/mill/types.dart

@@ -183,6 +183,7 @@ enum GameOverReason {
   loseReasonTimeOver,
   drawReasonThreefoldRepetition,
   drawReasonRule50,
+  drawReasonEndgameRule50,
   drawReasonBoardIsFull
 }
 

src/ui/flutter_app/lib/widgets/game_page.dart

@@ -1207,6 +1207,8 @@ class _GamePageState extends State<GamePage>
       GameOverReason.loseReasonTimeOver:
           loserStr + S.of(context).loseReasonTimeOver,
       GameOverReason.drawReasonRule50: S.of(context).drawReasonRule50,
+      GameOverReason.drawReasonEndgameRule50:
+          S.of(context).drawReasonEndgameRule50,
       GameOverReason.drawReasonBoardIsFull: S.of(context).drawReasonBoardIsFull,
       GameOverReason.drawReasonThreefoldRepetition:
           S.of(context).drawReasonThreefoldRepetition,

src/ui/flutter_app/lib/widgets/rule_settings_page.dart

@@ -86,6 +86,14 @@ class _RuleSettingsPageState extends State<RuleSettingsPage> {
             onTap: setNMoveRule,
           ),
           ListItemDivider(),
+          SettingsListTile(
+            context: context,
+            titleString: S.of(context).endgameNMoveRule,
+            subtitleString: S.of(context).endgameNMoveRule_Detail,
+            trailingString: Config.endgameNMoveRule.toString(),
+            onTap: setEndgameNMoveRule,
+          ),
+          ListItemDivider(),
         ],
       ),
       SizedBox(height: AppTheme.sizedBoxHeight),
@@ -331,6 +339,99 @@ class _RuleSettingsPageState extends State<RuleSettingsPage> {
     );
   }
 
+  setEndgameNMoveRule() {
+    callback(int? endgameNMoveRule) async {
+      print("[config] endgameNMoveRule = $endgameNMoveRule");
+
+      Navigator.of(context).pop();
+
+      setState(() {
+        rule.endgameNMoveRule =
+            Config.endgameNMoveRule = endgameNMoveRule ?? 100;
+      });
+
+      print("[config] rule.endgameNMoveRule: ${rule.endgameNMoveRule}");
+
+      Config.save();
+    }
+
+    showModalBottomSheet(
+      context: context,
+      builder: (BuildContext context) => Semantics(
+        label: S.of(context).endgameNMoveRule,
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: <Widget>[
+            RadioListTile(
+              activeColor: AppTheme.switchListTileActiveColor,
+              title: Text('5'),
+              groupValue: Config.endgameNMoveRule,
+              value: 5,
+              onChanged: callback,
+            ),
+            ListItemDivider(),
+            RadioListTile(
+              activeColor: AppTheme.switchListTileActiveColor,
+              title: Text('10'),
+              groupValue: Config.endgameNMoveRule,
+              value: 10,
+              onChanged: callback,
+            ),
+            ListItemDivider(),
+            RadioListTile(
+              activeColor: AppTheme.switchListTileActiveColor,
+              title: Text('20'),
+              groupValue: Config.endgameNMoveRule,
+              value: 20,
+              onChanged: callback,
+            ),
+            ListItemDivider(),
+            RadioListTile(
+              activeColor: AppTheme.switchListTileActiveColor,
+              title: Text('30'),
+              groupValue: Config.endgameNMoveRule,
+              value: 30,
+              onChanged: callback,
+            ),
+            ListItemDivider(),
+            RadioListTile(
+              activeColor: AppTheme.switchListTileActiveColor,
+              title: Text('50'),
+              groupValue: Config.endgameNMoveRule,
+              value: 50,
+              onChanged: callback,
+            ),
+            ListItemDivider(),
+            RadioListTile(
+              activeColor: AppTheme.switchListTileActiveColor,
+              title: Text('60'),
+              groupValue: Config.endgameNMoveRule,
+              value: 60,
+              onChanged: callback,
+            ),
+            ListItemDivider(),
+            RadioListTile(
+              activeColor: AppTheme.switchListTileActiveColor,
+              title: Text('100'),
+              groupValue: Config.endgameNMoveRule,
+              value: 100,
+              onChanged: callback,
+            ),
+            ListItemDivider(),
+            RadioListTile(
+              activeColor: AppTheme.switchListTileActiveColor,
+              title: Text('200'),
+              groupValue: Config.endgameNMoveRule,
+              value: 200,
+              onChanged: callback,
+            ),
+            ListItemDivider(),
+          ],
+        ),
+      ),
+    );
+  }
+
   setFlyPieceCount() {
     callback(int? flyPieceCount) async {
       print("[config] flyPieceCount = $flyPieceCount");

src/ui/qt/game.cpp

@@ -1619,6 +1619,9 @@ void Game::appendGameOverReasonToMoveHistory()
     case GameOverReason::drawReasonRule50:
         snprintf(record, Position::RECORD_LEN_MAX, drawReasonRule50Str);
         break;
+    case GameOverReason::drawReasonEndgameRule50:
+        snprintf(record, Position::RECORD_LEN_MAX, drawReasonEndgameRule50Str);
+        break;
     case GameOverReason::loseReasonBoardIsFull:
         snprintf(record, Position::RECORD_LEN_MAX, loseReasonBoardIsFullStr);
         break;
@@ -1719,12 +1722,15 @@ void Game::setTips()
         case GameOverReason::drawReasonRule50:
             reasonStr = "连续50回合无吃子判和。";
             break;
+        case GameOverReason::drawReasonEndgameRule50:
+            reasonStr = "残局中连续50回合无吃子判和。";
+            break;
         case GameOverReason::drawReasonBoardIsFull:
             reasonStr = "棋盘满判和。";
             break;
         default:
             break;
-        }       
+        }
 
         tips = reasonStr + resultStr + scoreStr;
         break;