2步杀:闪击,g4
li-0CwBD战术主题
闪击:一子闪开,另一子的攻击随之而来。
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2050 ShuffleRating——专家水平——很少有人一次解出。
黑方走棋——找出最佳续着
How to recognize this tactic
A discovered attack fires when one piece steps aside and unmasks the piece behind it. Look for your own units that block a rook, bishop or queen: moving the front piece — ideally with a threat of its own — springs two attacks in one move.
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 h2, 后 g2, 马 f3 f5, 兵 g3 h3 c4 f4 b5。
黑方:王 h7, 后 d2, 马 e1 f2, 兵 b6 f6 h6 g7。
棋盘上有9枚白棋和8枚黑棋;该题局面出现在第48回合之后。
The position in numbers
White are ahead by 1 points of material (20 against 19; 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 h7.
It is Black to move on move 48, with 33 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 5 pawns, Black 4. Files fully open (no pawns of either colour): a, d, e — natural highways for the rooks and queen. Half-open for Black: c.
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
48... Ng4+ 49. hxg4 Qxg2#
为何奏效
- 好棋!马到g4保持压力(#1)。
- 好棋!后到g2保持压力(#)。
- 该变着以2步强制将杀结束。
- 若改走hxg4,则Qxg2#,即被将杀。
Move by move
- 48… Ng4+ — 马 to g4 with check
- 49. hxg4 — 兵 to g4 (capture)
- Qxg2# — 后 to g2 (capture) and it is checkmate
本题的题型
护卫后杀
皇后贴脸将杀,身后有自己人保护。
有保护的贴身后杀是最常见的将杀图案:后紧贴国王落子,因为有己方棋子或兵保护而成杀。国王无处可逃:吃后不行——那格有保护,而周围所有格子后亲自看管。寻找敌王旁边受保护的格子:有马、象或兵控制它,后的登陆就成了将杀。只需核实一件事:那个格子真有保护,否则国王会直接吃掉后。
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。
反击
别忙着防守——用更大的威胁回敬对手。
反击:面对威胁你的回应不是防守,而是自己的威胁——更强的那种。趁对手吃你的兵,你宣布将杀:这笔账算在你这边。当直接防守都不好时寻找反击:你有没有将军、攻后的手段、做杀的威胁?新手的错误是对每个威胁都条件反射地防守,从不先查一查对攻资源。
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 014
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