2步杀:车到g7 (f7·6)
li-0I45B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1841 ShuffleRating——适合进阶战术爱好者。
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 g1, 车 a7 f7, 象 c3, 兵 a3 h3 g4。
黑方:王 g6, 车 d3 e6, 象 f6, 兵 b5 a6 h6 g7。
棋盘上有7枚白棋和8枚黑棋;该题局面出现在第39回合之后。
The position in numbers
Black are ahead by 1 points of material (16 against 17; 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 g6.
It is White to move on move 39, with 30 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): c, d, e, f — natural highways for the rooks and queen. Half-open for White: b.
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
39. Rxg7+ Bxg7 40. Rxg7#
为何奏效
- 好棋!车到g7保持压力(#1)。
- 好棋!车到g7保持压力(#)。
- 该变着以2步强制将杀结束。
- 若改走Bxg7,则Rxg7#,即被将杀。
Move by move
- 39. Rxg7+ — 车 to g7 (capture) with check
- Bxg7 — 象 to g7 (capture)
- 40. Rxg7# — 车 to g7 (capture) 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。
腾挪
带着先手把自己的子挪开,为决定性一击腾出线路。
让路:决定性打击被你自己的棋子挡住了——那就把它挪开,甚至干脆送掉。关键是带节奏地让路:闪开时带着将军、吃子或威胁,让对手来不及重新布防。识别特征:你看到后或车有一记好杀招,但需要的线路或格子被自己的棋子占着。别舍不得——让路的弃子通常比错失的攻势便宜得多。
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)。
题包 013
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