python编程三子棋的下棋逻辑

在Python中编写三子棋的下棋逻辑，我们需要考虑以下几个关键点[^2]:

1. **棋盘初始化**：
创建一个3x3的二维数组表示棋盘，初始时所有位置都是空格。

2. **玩家轮流落子**：
- 获取当前玩家的位置（通过输入或者随机选择）
- 检查该位置是否已被占据，如果不是则放置棋子并更新棋盘

3. **判断胜负条件**：
- 检查每个玩家的棋子是否形成了三子连线（水平、垂直或对角线）
- 使用嵌套循环遍历棋盘，对比相邻的三个位置

4. **平局判断**：
- 如果棋盘已满但无赢家，则判定为平局

下面是简单的伪代码概述：

def place_stone(board, player, position):
    if board[position] == " ":
        board[position] = player
        return True
    else:
        return False

def check_win(board, player):
    for i in range(3):
        # 水平检查
        for j in range(3):
            if board[i][j] == player and board[i][j+1] == player and board[i][j+2] == player:
                return True
        # 垂直检查
        for j in range(3):
            if board[j][i] == player and board[j+1][i] == player and board[j+2][i] == player:
                return True
        # 对角线检查
        if board[0][0] == player and board[1][1] == player and board[2][2] == player or \
           board[0][2] == player and board[1][1] == player and board[2][0] == player:
            return True

# 主游戏循环
while not (check_win(board, "player1") or check_win(board, "player2")) and not all(cell != " " for row in board for cell in row):
    # 让玩家1先手
    if current_player == "player1":
        position = get_user_input()
        if place_stone(board, "player1", position):
            current_player = "player2"
    else:
        random_position = choose_random_position(board)
        if place_stone(board, "player2", random_position):
            current_player = "player1"

if check_win(board, "player1"):
    print("Player 1 wins!")
elif check_win(board, "player2"):
    print("Player 2 wins!")
else:
    print("It's a tie!")