1步杀：闪击，d2
li-07C65战术主题
闪击：一子闪开，另一子的攻击随之而来。
一步将杀：找到让对方王无路可逃的一着棋。
难度1790 ShuffleRating——适合进阶战术爱好者。
黑方走棋——找出最佳续着
How to recognize this tactic
A discovered attack fires when one piece steps aside and unmasks the piece behind it. Look for your own units that block a rook, bishop or queen: moving the front piece — ideally with a threat of its own — springs two attacks in one move.
A mate in one hides among forcing checks. Run through every check you can give: does it cover all the king's escape squares, is the checking piece safe or supported, and can nothing block or capture it? If yes, that is the mate.
General method: before you move, list the forcing candidates — every check, every capture, every direct threat — and calculate those first. The solution to a tactic is almost always among them.
棋盘上的局面
白方：王 g1, 后 d1, 车 a1 f1, 象 c1, 兵 a2 b2 f2 h2 c4。
黑方：王 d7, 后 f3, 车 d8 g8, 象 g5, 兵 c6 e6 b7 f7 h7。
棋盘上有10枚白棋和10枚黑棋；该题局面出现在第24回合之后。
The position in numbers
Material is level — 27 points of pieces on each side (pawn = 1, knight and bishop = 3, rook = 5, queen = 9).
The white king stands on g1, the black king on d7.
It is Black to move on move 24, with 8 legal replies to weigh — only the line that keeps the advantage solves the puzzle. Black are in check right now, so every reply must answer the check.
White keeps 5 pawns, Black 5. Files fully open (no pawns of either colour): d, g — natural highways for the rooks and queen. Half-open for Black: a.
The Black king has 4 empty squares to step to right now — the fewer they are, the closer a mating net.
解答与讲解
主要变着
24... Bd2#
为何奏效
- 好棋！象到d2保持压力（#）。
- 该变着以1步强制将杀结束。
Move by move
- 24… Bd2# — 象 to d2 and it is checkmate
本题的题型
闪杀
一个子闪开——后面的子完成将杀。
闪杀：走动的棋子并不将杀——致命一击来自它身后的远程棋子。走动的那枚完全自由：它可以落在任何地方，最好去夺走国王最后的格子或守住关键点。寻找与敌王同线的己方车、象或后，中间恰好隔着一枚你的棋子。选择揭幕之着时别忘了它的第二职责：关死国王的逃生门。
一步杀
一步将杀——把它找出来。
一步杀：组合已经落幕，只剩最后一发精准的子弹。方法很简单——列出你所有的将军，对每一个检验国王的三条生路：逃跑、垫挡、吃掉将军者。三条都行不通，那就是将杀。典型错误是爱上找到的第一个将军，漏掉那扇唯一的逃生小窗。
挡将救局
带先手挡将——一举扭转局面。
垫将：你用棋子挡住将军，但不是消极地挡，而是带节奏地挡——垫挡的棋子自己制造威胁。这样的垫挡把防守变成进攻。被将军时比较全部三种应法：吃、走王、垫挡——并在垫挡中寻找带反威胁的那一步。错误做法是本可用积极垫挡扭转局面时，机械地走王了事。
来源
源自 Lichess 题库（CC0）。
经 Stockfish 深度 20+ 验证。
解法强制性已确认（verified）。
题包 013
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