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f8 (c5)
2步杀：象到f6 (e7)
攻击未易位的王：象到b6 (d4·6)
3步杀：后到b8 (g3)
3步杀：兵到d8 (c7)
3步杀：马到g3 (e2)
3步杀：车到b1 (d1·2)
3步杀：象到e3 (d2)
3步杀：后到e6 (e7)
3步杀：车到b1 (c1)
攻击未易位的王：兵到f5 (e4·72)
3步杀：车到c7 (c2·2)
3步杀：后到e6 (f7)
3步杀：象到d6 (a3)
3步杀：后到d5 (f3)
3步杀：后到a6 (b5)
攻击未易位的王：后到d6 (g3·3)
3步杀：后到c6 (b5)
3步杀：兵到f8 (e7)
3步杀：车到c6 (c5)
3步杀：后到f8 (f1)
3步杀：车到a1 (b1·3)
3步杀：后到a8 (a7·4)
2步杀：车到c7 (c1·3)
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