diff --git a/src/ui/flutter_app/lib/mill/mills.dart b/src/ui/flutter_app/lib/mill/mills.dart
index 03f7940c..f7dc3242 100644
--- a/src/ui/flutter_app/lib/mill/mills.dart
+++ b/src/ui/flutter_app/lib/mill/mills.dart
@@ -17,7 +17,7 @@
 */
 
 import 'package:sanmill/mill/position.dart';
-import 'package:sanmill/mill/rule.dart';
+import 'package:sanmill/services/storage/storage.dart';
 
 class Mills {
   const Mills._();
@@ -110,7 +110,7 @@ class Mills {
       /* 39 */ [0, 0, 0, 0],
     ];
 
-    if (rule.hasDiagonalLines) {
+    if (LocalDatabaseService.rules.hasDiagonalLines) {
       Position.adjacentSquares = adjacentSquares_diagonal;
     } else {
       Position.adjacentSquares = adjacentSquares;
@@ -524,7 +524,7 @@ class Mills {
       ]
     ];
 
-    if (rule.hasDiagonalLines) {
+    if (LocalDatabaseService.rules.hasDiagonalLines) {
       Position.millTable = millTable_diagonal;
     } else {
       Position.millTable = millTable;
diff --git a/src/ui/flutter_app/lib/mill/position.dart b/src/ui/flutter_app/lib/mill/position.dart
index 6ad2d403..975b62ca 100644
--- a/src/ui/flutter_app/lib/mill/position.dart
+++ b/src/ui/flutter_app/lib/mill/position.dart
@@ -20,7 +20,6 @@ import 'package:flutter/foundation.dart';
 import 'package:sanmill/mill/game.dart';
 import 'package:sanmill/mill/mills.dart';
 import 'package:sanmill/mill/recorder.dart';
-import 'package:sanmill/mill/rule.dart';
 import 'package:sanmill/mill/types.dart';
 import 'package:sanmill/mill/zobrist.dart';
 import 'package:sanmill/services/audios.dart';
@@ -155,7 +154,7 @@ class Position {
 
     phase = Phase.placing;
 
-    setPosition(rule); // TODO
+    setPosition(); // TODO
 
     // TODO
     recorder = GameRecorder(lastPositionWithRemove: fen());
@@ -283,13 +282,16 @@ class Position {
       score[PieceColor.draw] = score[PieceColor.draw]! + 1;
 
       // TODO: WAR to judge rule50
-      if (rule.nMoveRule > 0 && posKeyHistory.length >= rule.nMoveRule - 1) {
+      if (LocalDatabaseService.rules.nMoveRule > 0 &&
+          posKeyHistory.length >= LocalDatabaseService.rules.nMoveRule - 1) {
         gameOverReason = GameOverReason.drawReasonRule50;
-      } else if (rule.endgameNMoveRule < rule.nMoveRule &&
+      } else if (LocalDatabaseService.rules.endgameNMoveRule <
+              LocalDatabaseService.rules.nMoveRule &&
           isThreeEndgame &&
-          posKeyHistory.length >= rule.endgameNMoveRule - 1) {
+          posKeyHistory.length >=
+              LocalDatabaseService.rules.endgameNMoveRule - 1) {
         gameOverReason = GameOverReason.drawReasonEndgameRule50;
-      } else if (rule.threefoldRepetitionRule) {
+      } else if (LocalDatabaseService.rules.threefoldRepetitionRule) {
         gameOverReason =
             GameOverReason.drawReasonThreefoldRepetition; // TODO: Sure?
       } else {
@@ -345,7 +347,8 @@ class Position {
           (posKeyHistory.isNotEmpty &&
               st.key != posKeyHistory[posKeyHistory.length - 1])) {
         posKeyHistory.add(st.key);
-        if (rule.threefoldRepetitionRule && hasGameCycle()) {
+        if (LocalDatabaseService.rules.threefoldRepetitionRule &&
+            hasGameCycle()) {
           setGameOver(
             PieceColor.draw,
             GameOverReason.drawReasonThreefoldRepetition,
@@ -422,8 +425,8 @@ class Position {
 
     pieceOnBoardCount[PieceColor.white] =
         pieceOnBoardCount[PieceColor.black] = 0;
-    pieceInHandCount[PieceColor.white] =
-        pieceInHandCount[PieceColor.black] = rule.piecesCount;
+    pieceInHandCount[PieceColor.white] = pieceInHandCount[PieceColor.black] =
+        LocalDatabaseService.rules.piecesCount;
     pieceToRemoveCount = 0;
 
     // TODO:
@@ -508,11 +511,11 @@ class Position {
           phase = Phase.moving;
           action = Act.select;
 
-          if (rule.hasBannedLocations) {
+          if (LocalDatabaseService.rules.hasBannedLocations) {
             removeBanStones();
           }
 
-          if (!rule.isDefenderMoveFirst) {
+          if (!LocalDatabaseService.rules.isDefenderMoveFirst) {
             changeSideToMove();
           }
 
@@ -525,10 +528,12 @@ class Position {
         gameInstance.focusIndex = squareToIndex[s];
         await Audios.playTone(Sound.place);
       } else {
-        pieceToRemoveCount = rule.mayRemoveMultiple ? n : 1;
+        pieceToRemoveCount =
+            LocalDatabaseService.rules.mayRemoveMultiple ? n : 1;
         updateKeyMisc();
 
-        if (rule.mayOnlyRemoveUnplacedPieceInPlacingPhase &&
+        if (LocalDatabaseService
+                .rules.mayOnlyRemoveUnplacedPieceInPlacingPhase &&
             pieceInHandCount[them] != null) {
           pieceInHandCount[them] =
               pieceInHandCount[them]! - 1; // Or pieceToRemoveCount?
@@ -546,7 +551,7 @@ class Position {
             phase = Phase.moving;
             action = Act.select;
 
-            if (rule.isDefenderMoveFirst) {
+            if (LocalDatabaseService.rules.isDefenderMoveFirst) {
               changeSideToMove();
             }
 
@@ -567,7 +572,9 @@ class Position {
       }
 
       // if illegal
-      if (pieceOnBoardCount[sideToMove]! > rule.flyPieceCount || !rule.mayFly) {
+      if (pieceOnBoardCount[sideToMove]! >
+              LocalDatabaseService.rules.flyPieceCount ||
+          !LocalDatabaseService.rules.mayFly) {
         int md;
 
         for (md = 0; md < moveDirectionNumber; md++) {
@@ -610,7 +617,8 @@ class Position {
           await Audios.playTone(Sound.place);
         }
       } else {
-        pieceToRemoveCount = rule.mayRemoveMultiple ? n : 1;
+        pieceToRemoveCount =
+            LocalDatabaseService.rules.mayRemoveMultiple ? n : 1;
         updateKeyMisc();
         action = Act.remove;
         gameInstance.focusIndex = squareToIndex[s];
@@ -633,7 +641,7 @@ class Position {
     // if piece is not their
     if (!(PieceColor.opponent(sideToMove) == board[s])) return -2;
 
-    if (!rule.mayRemoveFromMillsAlways &&
+    if (!LocalDatabaseService.rules.mayRemoveFromMillsAlways &&
         potentialMillsCount(s, PieceColor.nobody) > 0 &&
         !isAllInMills(PieceColor.opponent(sideToMove))) {
       return -3;
@@ -643,7 +651,8 @@ class Position {
 
     await Audios.playTone(Sound.remove);
 
-    if (rule.hasBannedLocations && phase == Phase.placing) {
+    if (LocalDatabaseService.rules.hasBannedLocations &&
+        phase == Phase.placing) {
       // Remove and put ban
       board[s] = _grid[squareToIndex[s]!] = Piece.ban;
       updateKey(s);
@@ -660,7 +669,7 @@ class Position {
     }
 
     if (pieceOnBoardCount[them]! + pieceInHandCount[them]! <
-        rule.piecesAtLeastCount) {
+        LocalDatabaseService.rules.piecesAtLeastCount) {
       setGameOver(sideToMove, GameOverReason.loseReasonlessThanThree);
       return 0;
     }
@@ -680,11 +689,11 @@ class Position {
         phase = Phase.moving;
         action = Act.select;
 
-        if (rule.hasBannedLocations) {
+        if (LocalDatabaseService.rules.hasBannedLocations) {
           removeBanStones();
         }
 
-        if (rule.isDefenderMoveFirst) {
+        if (LocalDatabaseService.rules.isDefenderMoveFirst) {
           isGameOver();
           return 0;
         }
@@ -764,14 +773,16 @@ class Position {
       return true;
     }
 
-    if (rule.nMoveRule > 0 && posKeyHistory.length >= rule.nMoveRule) {
+    if (LocalDatabaseService.rules.nMoveRule > 0 &&
+        posKeyHistory.length >= LocalDatabaseService.rules.nMoveRule) {
       setGameOver(PieceColor.draw, GameOverReason.drawReasonRule50);
       return true;
     }
 
-    if (rule.endgameNMoveRule < rule.nMoveRule &&
+    if (LocalDatabaseService.rules.endgameNMoveRule <
+            LocalDatabaseService.rules.nMoveRule &&
         isThreeEndgame &&
-        posKeyHistory.length >= rule.endgameNMoveRule) {
+        posKeyHistory.length >= LocalDatabaseService.rules.endgameNMoveRule) {
       setGameOver(PieceColor.draw, GameOverReason.drawReasonEndgameRule50);
       return true;
     }
@@ -779,7 +790,7 @@ class Position {
     if (pieceOnBoardCount[PieceColor.white]! +
             pieceOnBoardCount[PieceColor.black]! >=
         rankNumber * fileNumber) {
-      if (rule.isWhiteLoseButNotDrawWhenBoardFull) {
+      if (LocalDatabaseService.rules.isWhiteLoseButNotDrawWhenBoardFull) {
         setGameOver(PieceColor.black, GameOverReason.loseReasonBoardIsFull);
       } else {
         setGameOver(PieceColor.draw, GameOverReason.drawReasonBoardIsFull);
@@ -789,7 +800,7 @@ class Position {
     }
 
     if (phase == Phase.moving && action == Act.select && isAllSurrounded()) {
-      if (rule.isLoseButNotChangeSideWhenNoWay) {
+      if (LocalDatabaseService.rules.isLoseButNotChangeSideWhenNoWay) {
         setGameOver(
           PieceColor.opponent(sideToMove),
           GameOverReason.loseReasonNoWay,
@@ -805,7 +816,7 @@ class Position {
   }
 
   void removeBanStones() {
-    assert(rule.hasBannedLocations);
+    assert(LocalDatabaseService.rules.hasBannedLocations);
 
     int s = 0;
 
@@ -961,7 +972,9 @@ class Position {
     }
 
     // Can fly
-    if (pieceOnBoardCount[sideToMove]! <= rule.flyPieceCount && rule.mayFly) {
+    if (pieceOnBoardCount[sideToMove]! <=
+            LocalDatabaseService.rules.flyPieceCount &&
+        LocalDatabaseService.rules.mayFly) {
       return false;
     }
 
@@ -982,7 +995,7 @@ class Position {
   }
 
   bool isStarSquare(int s) {
-    if (rule.hasDiagonalLines == true) {
+    if (LocalDatabaseService.rules.hasDiagonalLines == true) {
       return s == 17 || s == 19 || s == 21 || s == 23;
     }
 
@@ -993,9 +1006,11 @@ class Position {
 
   int get nPiecesInHand {
     pieceInHandCount[PieceColor.white] =
-        rule.piecesCount - pieceOnBoardCount[PieceColor.white]!;
+        LocalDatabaseService.rules.piecesCount -
+            pieceOnBoardCount[PieceColor.white]!;
     pieceInHandCount[PieceColor.black] =
-        rule.piecesCount - pieceOnBoardCount[PieceColor.black]!;
+        LocalDatabaseService.rules.piecesCount -
+            pieceOnBoardCount[PieceColor.black]!;
 
     return pieceOnBoardCount[PieceColor.white]! +
         pieceOnBoardCount[PieceColor.black]!;
@@ -1011,7 +1026,7 @@ class Position {
     }
   }
 
-  int setPosition(Rule newRule) {
+  int setPosition() {
     result = GameResult.pending;
 
     gamePly = 0;
@@ -1060,8 +1075,10 @@ class Position {
       }
     }
 
-    if (pieceOnBoardCount[PieceColor.white]! > rule.piecesCount ||
-        pieceOnBoardCount[PieceColor.black]! > rule.piecesCount) {
+    if (pieceOnBoardCount[PieceColor.white]! >
+            LocalDatabaseService.rules.piecesCount ||
+        pieceOnBoardCount[PieceColor.black]! >
+            LocalDatabaseService.rules.piecesCount) {
       return -1;
     }
 
diff --git a/src/ui/flutter_app/lib/mill/rule.dart b/src/ui/flutter_app/lib/mill/rule.dart
deleted file mode 100644
index e27e6766..00000000
--- a/src/ui/flutter_app/lib/mill/rule.dart
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
-  This file is part of Sanmill.
-  Copyright (C) 2019-2021 The Sanmill developers (see AUTHORS file)
-
-  Sanmill is free software: you can redistribute it and/or modify
-  it under the terms of the GNU General Public License as published by
-  the Free Software Foundation, either version 3 of the License, or
-  (at your option) any later version.
-
-  Sanmill is distributed in the hope that it will be useful,
-  but WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  GNU General Public License for more details.
-
-  You should have received a copy of the GNU General Public License
-  along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-import 'package:sanmill/services/language_info.dart';
-
-// TODO: [Leptopoda] deprecate this thingy. No reason to keep it
-class Rule {
-  String name = "Default Rule";
-  String description = "";
-  int piecesCount = specialCountryAndRegion == "Iran" ? 12 : 9;
-  int flyPieceCount = 3;
-  int piecesAtLeastCount = 3;
-  bool hasDiagonalLines = specialCountryAndRegion == "Iran";
-  bool hasBannedLocations = false;
-  bool mayMoveInPlacingPhase = false;
-  bool isDefenderMoveFirst = false;
-  bool mayRemoveMultiple = false;
-  bool mayRemoveFromMillsAlways = false;
-  bool mayOnlyRemoveUnplacedPieceInPlacingPhase = false;
-  bool isWhiteLoseButNotDrawWhenBoardFull = true;
-  bool isLoseButNotChangeSideWhenNoWay = true;
-  bool mayFly = true;
-  int nMoveRule = 100;
-  int endgameNMoveRule = 100;
-  bool threefoldRepetitionRule = true;
-}
-
-Rule rule = Rule();
-
-const ruleNumber = 4;
diff --git a/src/ui/flutter_app/lib/screens/game_page/game_page.dart b/src/ui/flutter_app/lib/screens/game_page/game_page.dart
index 8495aac6..242fae3e 100644
--- a/src/ui/flutter_app/lib/screens/game_page/game_page.dart
+++ b/src/ui/flutter_app/lib/screens/game_page/game_page.dart
@@ -26,7 +26,6 @@ import 'package:flutter/services.dart';
 import 'package:sanmill/generated/intl/l10n.dart';
 import 'package:sanmill/mill/game.dart';
 import 'package:sanmill/mill/position.dart';
-import 'package:sanmill/mill/rule.dart';
 import 'package:sanmill/mill/types.dart';
 import 'package:sanmill/models/preferences.dart';
 import 'package:sanmill/screens/game_settings/game_settings_page.dart';
@@ -234,13 +233,15 @@ class _GamePageState extends State<GamePage>
             } else {
               //Audios.playTone(Audios.place);
               if (gameInstance.engineType == EngineType.humanVsAi && mounted) {
-                if (rule.mayOnlyRemoveUnplacedPieceInPlacingPhase) {
+                if (LocalDatabaseService
+                    .rules.mayOnlyRemoveUnplacedPieceInPlacingPhase) {
                   showTip(S.of(context).continueToMakeMove);
                 } else {
                   showTip(S.of(context).tipPlaced);
                 }
               } else if (mounted) {
-                if (rule.mayOnlyRemoveUnplacedPieceInPlacingPhase) {
+                if (LocalDatabaseService
+                    .rules.mayOnlyRemoveUnplacedPieceInPlacingPhase) {
                   showTip(
                     S.of(context).tipPlaced,
                   ); // TODO: HumanVsHuman - Change tip
@@ -291,7 +292,7 @@ class _GamePageState extends State<GamePage>
 
               final us = gameInstance.sideToMove;
               if (position.phase == Phase.moving &&
-                  rule.mayFly &&
+                  LocalDatabaseService.rules.mayFly &&
                   (gameInstance.position.pieceOnBoardCount[us] ==
                           LocalDatabaseService.rules.flyPieceCount ||
                       gameInstance.position.pieceOnBoardCount[us] == 3)) {
@@ -454,7 +455,8 @@ class _GamePageState extends State<GamePage>
               (posKeyHistory.isNotEmpty &&
                   position.st.key != posKeyHistory[posKeyHistory.length - 1])) {
             posKeyHistory.add(position.st.key);
-            if (rule.threefoldRepetitionRule && position.hasGameCycle()) {
+            if (LocalDatabaseService.rules.threefoldRepetitionRule &&
+                position.hasGameCycle()) {
               position.setGameOver(
                 PieceColor.draw,
                 GameOverReason.drawReasonThreefoldRepetition,
diff --git a/src/ui/flutter_app/lib/services/storage/storage.dart b/src/ui/flutter_app/lib/services/storage/storage.dart
index 5b55438d..9ff89597 100644
--- a/src/ui/flutter_app/lib/services/storage/storage.dart
+++ b/src/ui/flutter_app/lib/services/storage/storage.dart
@@ -24,7 +24,6 @@ import 'package:flutter/foundation.dart'
 import 'package:flutter/material.dart' show Color, Locale;
 import 'package:hive_flutter/hive_flutter.dart';
 import 'package:path_provider/path_provider.dart';
-import 'package:sanmill/mill/rule.dart';
 import 'package:sanmill/models/color.dart';
 import 'package:sanmill/models/display.dart';
 import 'package:sanmill/models/preferences.dart';
@@ -82,7 +81,6 @@ class LocalDatabaseService {
     await _initDisplay();
     await _initPreferences();
     await _initRules();
-    DatabaseV1.initRules();
     await _DatabaseMigrator.migrate();
   }
 
@@ -161,10 +159,7 @@ class LocalDatabaseService {
       _rulesBox.listenable(keys: [rulesKey]);
 
   /// saves the given [rules] to the settings Box
-  static set rules(Rules rules) {
-    _rulesBox.put(rulesKey, rules);
-    DatabaseV1.initRules();
-  }
+  static set rules(Rules rules) => _rulesBox.put(rulesKey, rules);
 
   /// gets the given [Rules] from the settings Box
   static Rules get rules => _rulesBox.get(rulesKey) ?? Rules();
diff --git a/src/ui/flutter_app/lib/services/storage/storage_migration.dart b/src/ui/flutter_app/lib/services/storage/storage_migration.dart
index 8ca2908b..ee200dfa 100644
--- a/src/ui/flutter_app/lib/services/storage/storage_migration.dart
+++ b/src/ui/flutter_app/lib/services/storage/storage_migration.dart
@@ -74,11 +74,11 @@ class _DatabaseMigrator {
 
   /// Migration 0 - KV to Hive
   ///
-  /// - Calls the [DatabaseV1.migrateDB] to migrate from KV storage.
+  /// - Calls the [_DatabaseV1.migrateDB] to migrate from KV storage.
   static Future<void> _migrateToHive() async {
     assert(_currentVersion <= 0);
 
-    await DatabaseV1.migrateDB();
+    await _DatabaseV1.migrateDB();
     debugPrint("$_tag migrated from KV");
   }
 
@@ -111,8 +111,8 @@ class _DatabaseMigrator {
 /// Database KV Migrator
 ///
 /// This class provides helper methods to migrate from the old KV storage to the new hiveDB.
-class DatabaseV1 {
-  const DatabaseV1._();
+class _DatabaseV1 {
+  const _DatabaseV1._();
 
   static const _tag = "[KV store Migration]";
 
@@ -162,29 +162,4 @@ class DatabaseV1 {
       debugPrint("$_tag $_file does not exist");
     }
   }
-
-  /// initializes the [Rules] object with the contents of [LocalDatabaseService.rules]
-  static void initRules() {
-    final _rules = LocalDatabaseService.rules;
-    // Rules
-    rule.piecesCount = _rules.piecesCount;
-    rule.flyPieceCount = _rules.flyPieceCount;
-    rule.piecesAtLeastCount = _rules.piecesAtLeastCount;
-    rule.hasDiagonalLines = _rules.hasDiagonalLines;
-    rule.hasBannedLocations = _rules.hasBannedLocations;
-    rule.mayMoveInPlacingPhase = _rules.mayMoveInPlacingPhase;
-    rule.isDefenderMoveFirst = _rules.isDefenderMoveFirst;
-    rule.mayRemoveMultiple = _rules.mayRemoveMultiple;
-    rule.mayRemoveFromMillsAlways = _rules.mayRemoveFromMillsAlways;
-    rule.mayOnlyRemoveUnplacedPieceInPlacingPhase =
-        _rules.mayOnlyRemoveUnplacedPieceInPlacingPhase;
-    rule.isWhiteLoseButNotDrawWhenBoardFull =
-        _rules.isWhiteLoseButNotDrawWhenBoardFull;
-    rule.isLoseButNotChangeSideWhenNoWay =
-        _rules.isLoseButNotChangeSideWhenNoWay;
-    rule.mayFly = _rules.mayFly;
-    rule.nMoveRule = _rules.nMoveRule;
-    rule.endgameNMoveRule = _rules.endgameNMoveRule;
-    rule.threefoldRepetitionRule = _rules.threefoldRepetitionRule;
-  }
 }