diff --git a/src/engine/chengdu_mahjong_engine.py b/src/engine/chengdu_mahjong_engine.py
index 8072b7a..93ef324 100644
--- a/src/engine/chengdu_mahjong_engine.py
+++ b/src/engine/chengdu_mahjong_engine.py
@@ -44,53 +44,11 @@ class ChengduMahjongEngine:
         else:
             raise ValueError("杠牌条件不满足")
 
-# 设置缺门
-def set_missing_suit(player, missing_suit):
-    # 确定玩家的缺门
-    valid_suits = ["条", "筒", "万"]
-    if missing_suit not in valid_suits:
-        raise ValueError("缺门设置无效")
-    player.missing_suit = missing_suit
-
-
-# 判断是否可以流局
-def check_blood_battle(self):
-    if len(self.winners) >= 3 or self.state.remaining_tiles == 0:
-        self.game_over = True
-
-
-# 判断是否可以胡牌
-def can_win(hand):
-    # 判断是否满足胡牌条件（四组+一对）
-    from collections import Counter
-
-    # 判断缺一门
-    suits = [get_suit(tile) for tile, count in enumerate(hand) if count > 0]
-    if len(set(suits)) > 2:
-        return False  # 不满足缺一门
-
-    # 判断是否满足四组+一对
-    def is_valid_group(tiles):
-        # 判断是否为顺子、刻子或对子
-        return len(tiles) == 3 and (tiles[0] == tiles[1] == tiles[2] or
-                                    tiles[0] + 1 == tiles[1] and tiles[1] + 1 == tiles[2])
-
-    counter = Counter(hand)
-    pairs = [tile for tile, count in counter.items() if count >= 2]
-    for pair in pairs:
-        temp_hand = hand[:]
-        temp_hand[pair] -= 2
-        if is_valid_group(temp_hand):
-            return True
-    return False
-
-# 计算番数
-def calculate_fan(hand, melds, is_self_draw, is_cleared):
-    fan = 1  # 基本胡
-    if is_cleared:
-        fan += 2  # 清一色
-    if len(melds) >= 2:
-        fan += len(melds)  # 根据杠加番
-    if is_self_draw:
-        fan += 1  # 自摸加番
-    return fan
+    def check_blood_battle(self):
+        """
+        检查游戏是否流局或血战结束。
+        如果满足结束条件，设置 self.game_over 为 True。
+        """
+        if len(self.state.winners) >= 3 or self.state.remaining_tiles == 0:
+            print(f"游戏结束，赢家列表: {self.state.winners}")
+            self.game_over = True