2步杀:引离,b8
li-02g7h战术主题
引离:迫使防守的棋子离开岗位。
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1572 ShuffleRating——俱乐部棋手水平。
白方走棋——找出最佳续着
How to recognize this tactic
Deflection drags a defender away from its duty. Identify the enemy piece that guards a key square or mate, then force it to move — with a check, a capture or a threat it must answer — and strike where it no longer defends.
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 g2, 后 f8, 车 b7, 马 a5, 兵 a2 f2 h2 g3。
黑方:王 c8, 后 d4, 车 e6 d8, 马 d5, 兵 c6 a7 g7 h7。
棋盘上有8枚白棋和9枚黑棋;该题局面出现在第32回合之后。
The position in numbers
Black are ahead by 5 points of material (21 against 26; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on g2, the black king on c8.
It is White to move on move 32, with 43 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 4 pawns, Black 4. Files fully open (no pawns of either colour): b, d, e — natural highways for the rooks and queen. Half-open for White: c.
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
32. Rb8+ Kxb8 33. Qxd8#
为何奏效
- 好棋!车到b8保持压力(#1)。
- 好棋!后到d8保持压力(#)。
- 该变着以2步强制将杀结束。
- 若改走Kxb8,则Qxd8#,即被将杀。
Move by move
- 32. Rb8+ — 车 to b8 with check
- Kxb8 — 王 to b8 (capture)
- 33. Qxd8# — 后 to d8 (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。
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。
串击
线路攻击逼走价值高的子,暴露出它身后的目标。
串击是反过来的牵制:贵重的棋子站在前面,便宜的躲在它身后。大子被迫让开——你就吃掉躲在它影子里的那个。搜寻与另一枚己方棋子同线(直线、横线或斜线)的敌方国王或后。最凶狠的版本带将军:国王一让开,它身后的车就没命了。
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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