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c6 (g2·2)
3步杀：车到a1 (b1·4)
3步杀：车到g7 (g8·3)
3步杀：后到a7 (d7)
3步杀：马到e6 (c5·3)
3步杀：车到b7 (b1·3)
3步杀：马到e7 (d5·4)
攻击未易位的王：车到h8 (h7·8)
3步杀：后到e5 (a1·4)
3步杀：车到c5 (c2)
3步杀：后到f6 (e5·4)
3步杀：车到f6 (e6·2)
3步杀：车到b7 (f7)
3步杀：车到d7 (e7·2)
3步杀：后到c8 (b8·4)
3步杀：后到h8 (f6·4)
攻击未易位的王：后到c8 (a6·3)
3步杀：后到a5 (d8·2)
攻击未易位的王：后到e4 (d4·4)
3步杀：后到f6 (g7·4)
3步杀：车到g6 (h6·2)
攻击未易位的王：后到d5 (d4·3)
3步杀：象到a5 (d2·3)
攻击未易位的王：后到e5 (c5·2)
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