1步杀：牵制，g3 (h5)
li-046t6命名标签 (格·N)战术主题
一步将杀：找到让对方王无路可逃的一着棋。
牵制：棋子一动，身后更有价值的目标就会暴露。
难度1204 ShuffleRating——俱乐部棋手水平。
黑方走棋——找出最佳续着
How to recognize this tactic
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.
A pin freezes a piece in front of a more valuable one behind it. Scan the ranks, files and diagonals your bishop, rook or queen controls: if an enemy piece cannot move without exposing its king or queen, it is pinned and can be piled on or bypassed.
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 h1, 后 d1, 车 a1 f1, 象 d2 c4, 马 c3 f4, 兵 b2 c2 g2 h2 a3 d3 e4。
黑方：王 g8, 后 h4, 车 a8 f8, 象 b6 c8, 马 h5 c6, 兵 h6 a7 b7 c7 d7 f7 g7。
棋盘上有15枚白棋和15枚黑棋；该题局面出现在第13回合之后。
The position in numbers
Material is level — 38 points of pieces on each side (pawn = 1, knight and bishop = 3, rook = 5, queen = 9).
The white king stands on h1, the black king on g8.
It is Black to move on move 13, with 38 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 7 pawns, Black 7. No file is fully open, so the heavy pieces have to be pried in. Half-open for Black: e.
The Black king has 2 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
13... Ng3#
为何奏效
- 好棋！马到g3保持压力（#）。
- 该变着以1步强制将杀结束。
Move by move
- 13… Ng3# — 马 to g3 and it is checkmate
本题的题型
马杀
马以它独一无二的角度送出致命一击。
马杀：最后一击由马完成——它是唯一无法用垫挡化解将军的棋子。正因如此，马对被挤住的国王格外致命：只有走王或吃掉马本身才有救。识别特征：国王周围的格子被占据或受控，而存在一个马能安然无恙地跳过去将军的格子。提前把马调往前线：它比远程棋子慢，但它的打击无法招架。
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。
角落杀
被逼进角落的王，再也没有落脚的格子。
角落杀：国王被赶进棋盘一角，那里他只有三个相邻格——而它们全被夺走或占据。角落是国王最糟糕的住所：进攻方需要控制的格子最少。用将军把国王往角落里赶，绝不让他溜回中心。在最后一击之前切断所有逃亡路线——将杀几乎会自己成形。
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 008
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