2步杀：牵制，e8 (e1)
li-05xh6命名标签 (格·N)战术主题
两步将杀：第一步制造无法化解的威胁，第二步完成将杀。
牵制：棋子一动，身后更有价值的目标就会暴露。
难度1489 ShuffleRating——俱乐部棋手水平。
白方走棋——找出最佳续着
How to recognize this tactic
Mate in two usually opens with a forcing move — a check, a capture or an unstoppable threat — that strips the king of squares or defenders, so the follow-up mate becomes unavoidable. Look for the first move that leaves the opponent only losing replies.
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 h2, 后 c3, 车 e1, 象 g2, 兵 h3 b4 d6。
黑方：王 h8, 后 g5, 车 a2, 马 d7 g7, 兵 b5 g6 f7 h7。
棋盘上有7枚白棋和9枚黑棋；该题局面出现在第36回合之后。
The position in numbers
Black are ahead by 4 points of material (20 against 24; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on h2, the black king on h8.
It is White to move on move 36, with 37 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 3 pawns, Black 4. Files fully open (no pawns of either colour): a, c, e — natural highways for the rooks and queen. Half-open for White: f, g.
The White 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
36. Re8+ Nf8 37. Rxf8#
为何奏效
- 好棋！车到e8保持压力（#1）。
- 好棋！车到f8保持压力（#）。
- 该变着以2步强制将杀结束。
- 若改走Nf8，则Rxf8#，即被将杀。
Move by move
- 36. Re8+ — 车 to e8 with check
- Nf8 — 马 to f8
- 37. Rxf8# — 车 to f8 (capture) and it is checkmate
本题的题型
底线杀
王被自己的兵关在里面——重子直捣底线。
底线杀：国王被自己一排未动的兵关在后面，车或后突入底线一锤定音。识别特征：王前的兵没动过、没有通气口，底线只有一个守卫，甚至无人看守。常见手法是先引开或兑掉那个孤独的哨兵，再沿线突击。在自己的对局中要及时开气孔：一步兵着就能免除一场突发灾难。
两步杀
两步之内的强制将杀。
两步杀：你走一步，对方任意应一步，然后是致命一击。从最强制的首着开始：将军和弃子，把对手的选择压到最少。对他的每一种应法，你都必须备好将杀——所有回应都要检查，一个不漏。常见的失误是算清了漂亮的防守，却忘了那个平淡无奇的。
解杀
杀棋已成威胁——化解它并保持优势。
解杀：对手离将杀只差一步——但现在轮到你走，这改变了一切。寻找既解除杀棋威胁又保住你优势的防守：常常是一步将军或反威胁，让对方腾不出手来做杀。先准确说出对方要在哪个格子将杀你——否则就是蒙着眼防守。错误做法是走一步实际并没有解除威胁的「防守」。
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 011
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