2步杀：车到e1 (e8)
li-02s84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。
难度698 ShuffleRating——适合初学者迈出Chess960战术的第一步。
黑方走棋——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.
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, 车 a4 a7, 兵 f2 g3 h3。
黑方：王 f8, 车 e8, 象 c3 d5。
棋盘上有6枚白棋和4枚黑棋；该题局面出现在第38回合之后。
The position in numbers
White are ahead by 2 points of material (13 against 11; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on g1, the black king on f8.
It is Black to move on move 38, with 36 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 3 pawns, Black 0. Files fully open (no pawns of either colour): a, b, c, d, e — natural highways for the rooks and queen. Half-open for Black: f, g, h.
Black hold the bishop pair, an edge in open lines. The Black king has 1 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
38... Re1+ 39. Kh2 Rh1#
为何奏效
- 好棋！车到e1保持压力（#1）。
- 好棋！车到h1保持压力（#）。
- 该变着以2步强制将杀结束。
- 若改走Kh2，则Rh1#，即被将杀。
Move by move
- 38… Re1+ — 车 to e1 with check
- 39. Kh2 — 王 to h2
- Rh1# — 车 to h1 and it is checkmate
本题的题型
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。
残局战术
残局里同样有战术——子力稀少时照样出击。
战术不会随着后的兑换而退休：捉双、牵制和双重攻击在残局里照样活跃。子力所剩无几，因此这里每一次战术损失几乎都直接定胜负。特征还是老几样：无保护的棋子、王与棋子同线、即将升变的兵。建议：即使在「纯技术」残局里，每步棋前也要搜一遍战术——自己的和对方的。
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 001
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