From 4b96b675e5dcc2d88f7e6227308bbeb53d446927 Mon Sep 17 00:00:00 2001
From: CalciteM <calcitem@outlook.com>
Date: Sun, 23 Jun 2019 15:27:32 +0800
Subject: [PATCH] =?UTF-8?q?=E8=8B=A5=E4=B8=BA=E5=85=88=E6=89=8B=E5=88=99?=
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---
 NineChess/src/ninechess.h        | 7 +++++++
 NineChess/src/ninechessai_ab.cpp | 9 ++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/NineChess/src/ninechess.h b/NineChess/src/ninechess.h
index 01c96970..0ce797f6 100644
--- a/NineChess/src/ninechess.h
+++ b/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);
 
diff --git a/NineChess/src/ninechessai_ab.cpp b/NineChess/src/ninechessai_ab.cpp
index 3c45fa7c..54e22e28 100644
--- a/NineChess/src/ninechessai_ab.cpp
+++ b/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);
+                    }
                 }
             }
         }