吃掉无保护的后(f8)
li-0KJU6战术主题
悬子:对方有棋子无人保护——吃掉它。
难度1903 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
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 h1, 后 f7, 马 g1, 兵 a3 d3 g3 b4 c4。
黑方:王 h8, 后 d1, 象 f8, 兵 e2 b6 a7 c7 g7。
棋盘上有8枚白棋和8枚黑棋;该题局面出现在第38回合之后。
The position in numbers
Material is level — 17 points of pieces on each side (pawn = 1, knight and bishop = 3, rook = 5, queen = 9).
The white king stands on h1, the black king on h8.
It is White to move on move 38, with 24 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 5 pawns, Black 5. Files fully open (no pawns of either colour): f, h — natural highways for the rooks and queen. Half-open for White: e.
The White 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
38. Qxf8+ Kh7 39. Qf5+ g6 40. Qf7+
为何奏效
- 好棋!后到f8保持压力(+4.9)。
- 好棋!后到f5保持压力(+5.1)。
- 好棋!后到f7保持压力(+5.3)。
- 你赢得一子——象。
- 若改走Kh7,则Qf5+,你赢得象。
Move by move
- 38. Qxf8+ — 后 to f8 (capture) with check
- Kh7 — 王 to h7
- 39. Qf5+ — 后 to f5 with check
- g6 — 兵 to g6
- 40. Qf7+ — 后 to f7 with check
本题的题型
连将追击
步步将军——把王一路追到必败之地。
连将追击:你的每一步都是将军,对手连一秒钟都腾不出来实施自己的计划。国王被赶着满盘跑,直到丢子或撞上致命一击。这类变化最容易计算:每次将军,王只有寥寥几种应法——全部枚举即可。养成习惯:任何尖锐局面的计算都从将军开始,它们是棋盘上最强制的着法。
后残局
开放棋盘上的皇后大战——精确高于一切。
后残局阴险难测:后无处不达,一个不准就把胜势变成长将和棋。主题特征:兵很少、王暴露、连环将军的味道飘在空中。提前把王藏好,并利用自己的将军带节奏地调后靠近、或推进通路兵。错误做法是只顾吃兵,把王丢给无穷无尽的将军。
来源
源自 Lichess 题库(CC0)。
题包 014
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