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：车到f7 (e7)
3步杀：后到b8 (a8)
3步杀：马到e6 (c7·2)
3步杀：后到h3 (f1)
3步杀：后到g8 (h8)
3步杀：后到d5 (e4)
3步杀：车到h2 (h1)
3步杀：后到f6 (a1)
3步杀：马到f6 (e4·2)
3步杀：车到g2 (h2)
3步杀：兵到f8 (f7)
3步杀：王到c2 (d1)
3步杀：后到e7 (f7·4)
攻击未易位的王：后到f6 (e7)
2步杀：马到c3
3步杀：车到b1
3步杀：后到e7 (h4·4)
2步杀：后到e5 (c3)
2步杀：后到c6 (a8·3)
3步杀：后到c7 (b7)
3步杀：后到g7 (g6)
3步杀：后到h7 (h5)
3步杀：车到d8 (d5)
3步杀：后到d7 (d5)
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