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g7 (g4)
3步杀：兵到e3 (f2)
3步杀：马到e6 (g5·3)
3步杀：后到f7 (f4·2)
3步杀：王到c1
3步杀：兵到g4 (h3)
3步杀：车到b5 (d5)
3步杀：后到f7 (f3·3)
3步杀：车到e7 (e5·2)
3步杀：车到f6 (g6)
3步杀：象到b6 (e3)
3步杀：马到f7 (d6·2)
攻击未易位的王：后到d8 (e7·2)
3步杀：车到h6 (g6)
3步杀：后到f5 (d7·2)
3步杀：后到d7 (c6·2)
3步杀：车到h7 (h8·2)
3步杀：车到d6 (d4)
3步杀：车到f8 (d8·2)
3步杀：马到f5 (e7)
3步杀：车到d1 (e1·2)
3步杀：车到f4 (d4)
3步杀：马到d4 (b5)
3步杀：兵到h7 (g6)
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