2步杀:王到a6
li-02DwR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。
解救棋子:你的棋子正受攻击——找到最佳解救方法。
难度1424 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.
Here the task is defensive: one of your pieces is under attack and must be rescued without losing more. Look for a move that saves it with tempo — a counter-check, an equal counter-attack or an interposition — rather than a passive retreat.
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 b6, 马 b5, 兵 a7。
黑方:王 a8, 马 c4, 兵 e3 g3。
棋盘上有3枚白棋和4枚黑棋;该题局面出现在第60回合之后。
The position in numbers
Black are ahead by 1 points of material (4 against 5; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on b6, the black king on a8.
It is White to move on move 60, with 4 legal replies to weigh — only the line that keeps the advantage solves the puzzle. White are in check right now, so every reply must answer the check.
White keeps 1 pawns, Black 2. Files fully open (no pawns of either colour): b, c, d, f, h — natural highways for the rooks and queen. Half-open for White: e, g.
The White king has 4 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
60. Ka6 e2 61. Nc7#
为何奏效
- 好棋!王到a6保持压力(#1)。
- 好棋!马到c7保持压力(#)。
- 该变着以2步强制将杀结束。
- 若改走e2,则Nc7#,即被将杀。
Move by move
- 60. Ka6 — 王 to a6
- e2 — 兵 to e2
- 61. Nc7# — 马 to c7 and it is checkmate
本题的题型
马杀
马以它独一无二的角度送出致命一击。
马杀:最后一击由马完成——它是唯一无法用垫挡化解将军的棋子。正因如此,马对被挤住的国王格外致命:只有走王或吃掉马本身才有救。识别特征:国王周围的格子被占据或受控,而存在一个马能安然无恙地跳过去将军的格子。提前把马调往前线:它比远程棋子慢,但它的打击无法招架。
唯一着法
其他任何一步都会输——找到唯一撑得住的那一步。
唯一着法:除了独一无二的那步棋,其余全输的局面。这里不能「顺手」下棋:把原则上不同的防守都过一遍——逃跑、垫挡、兑换、反击——再淘汰被驳倒的。这类题目的标志:显而易见的着法很快就输,而正解常常看起来古怪。先弄清威胁你的究竟是什么——那步唯一的防守自会现身。
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 010
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