吃掉无保护的王(b7)
li-0IZXa战术主题
悬子:对方有棋子无人保护——吃掉它。
难度1944 ShuffleRating——适合进阶战术爱好者。
黑方走棋——找出最佳续着
How to recognize this tactic
A hanging piece is one that is attacked and not defended, or defended too few times. Count attackers against defenders on each enemy unit; where attackers win, take it — often with an in-between move or a check to gain the extra tempo.
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, 后 c2, 车 c6 b7, 兵 f2 a3 g3 e5。
黑方:王 b8, 后 g4, 车 d8 g8, 兵 b2 f5 a7。
棋盘上有8枚白棋和7枚黑棋;该题局面出现在第31回合之后。
The position in numbers
White are ahead by 1 points of material (23 against 22; 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 b8.
It is Black to move on move 31, with 2 legal replies to weigh — only the line that keeps the advantage solves the puzzle. Black are in check right now, so every reply must answer the check.
White keeps 4 pawns, Black 3. Files fully open (no pawns of either colour): c, d, h — natural highways for the rooks and queen. Half-open for Black: e, g.
The Black king has 2 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
31... Kxb7 32. Rc7+ Kb8 33. Qxb2+ Kxc7
为何奏效
- 好棋!王到b7保持压力(+6.0)。
- 好棋!王到b8保持压力(+6.9)。
- 好棋!王到c7保持压力(+7.1)。
- 你赢得一子——车。
- 若改走Rc7+,则Kb8,你赢得车。
Move by move
- 31… Kxb7 — 王 to b7 (capture)
- 32. Rc7+ — 车 to c7 with check
- Kb8 — 王 to b8
- 33. Qxb2+ — 后 to b2 (capture) with check
- Kxc7 — 王 to c7 (capture)
本题的题型
引离
把防守者从岗位上引开——再攻击它守护的目标。
引离:你迫使守卫离开岗位——用弃子或交换把它从它保护的棋子或格子旁拽走。先找出关键的看守者:少了它,防杀或保子的体系就会崩塌。然后找一步它无法置之不理的棋——最常见的是吃子。别心疼子力:如果守卫离开后你能做杀或吃后,这笔投资会加倍收回。
王的撤离
王迈开自己的脚步走出危险区。
国王撤离:掩体既已坍塌,王就徒步走出攻击区——有时要横穿半个棋盘。一连串精确的王着把他带出火力圈,对手的攻势随之消散。识别特征:没有一种直接防守管用,但存在一条经过安全格、通往棋盘僻静角落的路线。要提前算好全程——半路抛锚的王通常就死在半路。
消除保护者
先吃掉守卫——再拿下它保护的目标。
消灭守卫是最直白的计划:先干掉看守,再拿走它守护的东西。与引离不同,守卫不是被支走的——而是被就地兑掉或消灭。盯着你想吃的目标问:谁在保护它?这个保护者能不能被划算地吃掉?要计算整串吃子的最终得失,而不是只看第一步——这笔交换必须以最后的战利品回本。
来源
源自 Lichess 题库(CC0)。
题包 014
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