3步杀：车到h3
li-01a8M战术主题
三步将杀：一段以将杀收尾的强制着法。
难度1181 ShuffleRating——俱乐部棋手水平。
黑方走棋——找出最佳续着
How to recognize this tactic
In a mate in three every move must be forcing; the defender should never get a free tempo. Find the check or threat that herds the king, calculate the single defence to each, and confirm the net closes on the third move.
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 h4, 车 d6 a7, 兵 a2 h3 e4 f4。
黑方：王 g7, 车 c3 g3, 兵 b6 f7 h7。
棋盘上有7枚白棋和6枚黑棋；该题局面出现在第34回合之后。
The position in numbers
White are ahead by 1 points of material (14 against 13; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on h4, the black king on g7.
It is Black to move on move 34, with 27 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 4 pawns, Black 3. Files fully open (no pawns of either colour): c, d, g — natural highways for the rooks and queen. Half-open for Black: a, e.
The Black king has 3 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
34... Rxh3+ 35. Kg5 Rcg3+ 36. Kf5 Rh5#
为何奏效
- 好棋！车到h3保持压力（#2）。
- 好棋！车到g3保持压力（#1）。
- 好棋！车到h5保持压力（#）。
- 该变着以3步强制将杀结束。
- 若改走Kg5，则Rcg3+，你仍占优。
Move by move
- 34… Rxh3+ — 车 to h3 (capture) with check
- 35. Kg5 — 王 to g5
- Rcg3+ — 车 to g3 with check
- 36. Kf5 — 王 to f5
- Rh5# — 车 to h5 and it is checkmate
本题的题型
三步杀
三步之内的强制将杀。
三步杀是一道强制的阶梯：你的每一步都收窄对手的选择，第三步画上句号。到将军和弃子中寻找开局之着：杀题里安静的首着虽少见，却格外阴险。脑中要有变化树：每种防守对应自己的分支。别在第二步就停下——最终的将杀图景必须亲眼算到。
车残局
最常见的残局——一切取决于子力的活跃度。
车残局是实战中最常见的残局：盘上是车和兵。第一法则是积极性：站在通路兵身后的车，胜过消极守兵的车。正确计划的标志——你的车在攻击什么，而不是在看守什么。错误做法是把车锁死在护兵岗位上：常常宁可丢一兵，也要保住活跃的车和活跃的王。
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 007
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