diff --git a/include/config.h b/include/config.h
index d871a56b..f1e3349d 100644
--- a/include/config.h
+++ b/include/config.h
@@ -56,7 +56,7 @@
 //#define EVALUATE_MOTIF
 #endif /* EVALUATE_ENABLE */
 
-//#define MILL_FIRST
+#define MILL_FIRST
 
 //#define DEAL_WITH_HORIZON_EFFECT
 
diff --git a/src/ai/search.cpp b/src/ai/search.cpp
index 5e9ab1b6..d9babf41 100644
--- a/src/ai/search.cpp
+++ b/src/ai/search.cpp
@@ -221,8 +221,7 @@ struct AIAlgorithm::Node *AIAlgorithm::addNode(
         if (bestMove == 0 || move != bestMove) {
 #ifdef MILL_FIRST
             // 优先成三
-            if (tempGame.getPhase() == PHASE_PLACING && move > 0 &&
-                tempGame.position.board.inHowManyMills2((square_t)move)) {
+            if (move > 0 && tempGame.position.board.inHowManyMills((square_t)(move & 0x00ff), tempGame.position.sideToMove)) {
                 int pcs = parent->childrenSize;
                 for (int i = pcs; i >= 1; i--) {
                     parent->children[i] = parent->children[i - 1];
diff --git a/src/game/board.cpp b/src/game/board.cpp
index a7ab609f..127a62cf 100644
--- a/src/game/board.cpp
+++ b/src/game/board.cpp
@@ -225,7 +225,7 @@ int Board::inHowManyMills(square_t square)
     return n;
 }
 
-int Board::inHowManyMills2(square_t square)
+int Board::inHowManyMills(square_t square, player_t player)
 {
     int n = 0;
     int square_1, square_2;
@@ -233,7 +233,7 @@ int Board::inHowManyMills2(square_t square)
     for (int l = 0; l < LINE_TYPES_COUNT; l++) {
         square_1 = millTable[square][l][0];
         square_2 = millTable[square][l][1];
-        if (locations[square_1] & locations[square_2]) {
+        if (player & locations[square_1] & locations[square_2]) {
             n++;
         }
     }
diff --git a/src/game/board.h b/src/game/board.h
index 98ac3040..3fa336b9 100644
--- a/src/game/board.h
+++ b/src/game/board.h
@@ -70,7 +70,7 @@ public:
 
     // 判断棋盘 square 处的棋子处于几个“三连”中
     int inHowManyMills(square_t square);
-    int inHowManyMills2(square_t square);
+    int inHowManyMills(square_t square, player_t player);
 
     // 判断玩家的所有棋子是否都处于“三连”状态
     bool isAllInMills(player_t);