Chess960 战术题：天梯杀
两个重子一线一线地推进，切断所有退路。
1518 道题
3步杀：象到b4 (c3)
3步杀：马到f5 (d4·4)
3步杀：后到c8 (c7·3)
3步杀：车到g8 (e8·2)
3步杀：后到c6 (c2·2)
3步杀：车到a7 (a1·2)
3步杀：车到b7 (d7)
3步杀：后到b8 (a7·5)
3步杀：车到h8 (h7·2)
攻击未易位的王：后到d6 (g3·4)
3步杀：兵到h6 (g5)
3步杀：后到h7 (h4·3)
3步杀：车到f8 (f7·2)
3步杀：后到g7 (g3·2)
3步杀：后到g6 (h6·5)
3步杀：后到h8 (g7·6)
3步杀：象到h3
3步杀：车到a8 (a7)
3步杀：象到h6 (e3)
3步杀：车到e7 (e6·2)
3步杀：车到d7 (d5·4)
3步杀：后到a5 (e1·3)
攻击未易位的王：后到e5 (d4·5)
3步杀：马到c5 (d3·3)
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