```C
// 设置初始棋子（4x4交点式棋盘）
gameState.board[0][0] = PLAYER_WHITE;
gameState.board[0][2] = PLAYER_WHITE;
gameState.board[0][3] = PLAYER_WHITE;
gameState.board[0][4] = PLAYER_WHITE;
gameState.board[1][1] = PLAYER_WHITE;

gameState.board[3][1] = PLAYER_BLACK;
gameState.board[4][0] = PLAYER_BLACK;
gameState.board[4][2] = PLAYER_BLACK;
gameState.board[4][3] = PLAYER_BLACK;
gameState.board[4][4] = PLAYER_BLACK;
```