若为先手则第一着棋抢占星位

NineChess/src/ninechess.h

@@ -252,6 +252,12 @@ public:
         return currentPos;
     }
 
+    // 判断位置点是否为星位 (星位是经常会先占的位置)
+    static bool isStartPoint(int pos)
+    {
+        return (pos == 17 || pos == 19 || pos == 21 || pos == 23);
+    }
+
     // 获取当前步数
     int getStep() const
     {
@@ -281,6 +287,7 @@ public:
     {
         return winner;
     }
+
     // 玩家1和玩家2的用时
     void getElapsedTimeMS(int &p1_ms, int &p2_ms);
 

NineChess/src/ninechessai_ab.cpp

@@ -61,7 +61,14 @@ void NineChessAi_ab::buildChildren(Node *node)
         if ((chessTemp.context.stage) & (NineChess::GAME_PLACING | NineChess::GAME_NOTSTARTED)) {
             for (int i = NineChess::POS_BEGIN; i < NineChess::POS_END; i++) {
                 if (!chessTemp.board_[i]) {
-                    addNode(node, 0, i);
+                    if (node == rootNode && chessTemp.context.stage == NineChess::GAME_NOTSTARTED) {
+                        // 若为先手，则抢占星位
+                        if (NineChess::isStartPoint(i)) {
+                            addNode(node, INT32_MAX, i);
+                        }
+                    } else {
+                        addNode(node, 0, i);
+                    }
                 }
             }
         }