国际象棋的经典程序。其基本思想和框架结构被后来的国象程序及其它许多棋类程序开发者借鉴。经证明其中的大部分算法和结构仍是最优的。-chess classic procedures. Its basic idea and structure of the fr a mework of the country by later processes like chess and many other developers learn from. Proved the most algorithm and