diff --git a/src/main/java/com/webgame/webgamebackend/service/impl/GameServiceImpl.java b/src/main/java/com/webgame/webgamebackend/service/impl/GameServiceImpl.java
index cbfb93a..ae580b8 100644
--- a/src/main/java/com/webgame/webgamebackend/service/impl/GameServiceImpl.java
+++ b/src/main/java/com/webgame/webgamebackend/service/impl/GameServiceImpl.java
@@ -471,7 +471,7 @@ public class GameServiceImpl implements GameService {
                     .toList();
 
             // 从走棋记录重建棋盘
-            boardState = GomokuGameService.rebuildBoard(moveEntities, room.getMaxPlayers());
+            boardState = GomokuGameService.rebuildBoard(moveEntities, GomokuGameService.BOARD_SIZE);
             // currentTurn 由服务端运行时管理，HTTP 快照中暂不返回
         }
 
diff --git a/src/main/java/com/webgame/webgamebackend/service/impl/GomokuGameServiceImpl.java b/src/main/java/com/webgame/webgamebackend/service/impl/GomokuGameServiceImpl.java
index eeaea7a..080b227 100644
--- a/src/main/java/com/webgame/webgamebackend/service/impl/GomokuGameServiceImpl.java
+++ b/src/main/java/com/webgame/webgamebackend/service/impl/GomokuGameServiceImpl.java
@@ -60,7 +60,11 @@ public class GomokuGameServiceImpl implements GomokuGameService {
         int moveCount = moves.size();
 
         // 判定当前玩家应该下哪一方（黑先白后）
-        List<RoomPlayerEntity> players = roomPlayerRepository.findByRoomId(roomId);
+        // 按座位号排序，确保黑方/白方分配与座位对应（seat=1 为黑方先手）
+        List<RoomPlayerEntity> players = roomPlayerRepository.findByRoomId(roomId)
+                .stream()
+                .sorted(java.util.Comparator.comparingInt(RoomPlayerEntity::getSeatNumber))
+                .toList();
         int playerIndex = -1;
         for (int i = 0; i < players.size(); i++) {
             if (players.get(i).getUserId().equals(userId)) {