2步杀：象到e2 (d3·2)
li-00WqT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1550 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.
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 b2, 车 g3, 象 d3 e3, 兵 a2 c2 f2 c3 e4 f5。
黑方：王 h5, 后 h2, 车 a8 f8, 象 d7, 兵 a6 d6 g6 b7 c7 f7。
棋盘上有10枚白棋和11枚黑棋；该题局面出现在第27回合之后。
The position in numbers
Black are ahead by 11 points of material (17 against 28; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on b2, the black king on h5.
It is White to move on move 27, with 34 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 6 pawns, Black 6. Files fully open (no pawns of either colour): h — natural highways for the rooks and queen. Half-open for White: b, d, g.
White hold the bishop pair, an edge in open lines. The White king has 5 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
27. Be2+ Kh4 28. Bg5#
为何奏效
- 好棋！象到e2保持压力（#1）。
- 好棋！象到g5保持压力（#）。
- 该变着以2步强制将杀结束。
- 若改走Kh4，则Bg5#，即被将杀。
Move by move
- 27. Be2+ — 象 to e2 with check
- Kh4 — 王 to h4
- 28. Bg5# — 象 to g5 and it is checkmate
本题的题型
双象杀
双象扫射两条相邻的斜线——王无处可藏。
双象杀：一对象扫射两条相邻的斜线——一只将杀，另一只切断退路。双象配合天衣无缝：一个住浅色格、一个住深色格，合起来覆盖棋盘上一条连续的地带。图案多出现在国王事先被压到的边缘或角落。攻击到来之前请珍惜双象：在开放棋盘上，两条相邻斜线就是一堵墙。
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。
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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