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：后到e7 (e8·2)
3步杀：象到b5 (d3)
3步杀：后到h5 (d1·3)
3步杀：后到e8 (e5)
2步杀：象到e6 (d5·3)
3步杀：后到f6 (g5·2)
攻击未易位的王：车到f8 (f5·4)
3步杀：后到g7 (f8)
3步杀：车到c1 (c4)
3步杀：马到e6 (c7·3)
3步杀：车到f3 (h3)
攻击未易位的王：后到b8 (g3·2)
3步杀：车到d3 (e3)
3步杀：车到d6 (d1·3)
3步杀：后到c8 (b8)
3步杀：兵到g4 (g2·2)
3步杀：后到e5 (b5)
3步杀：王到g2 (h3)
3步杀：车到b1 (a1)
3步杀：象到e4 (d5)
3步杀：后到d6 (a3·3)
3步杀：后到f6 (e5·3)
2步杀：后到f6 (f4·2)
3步杀：车到c7 (f7)
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