捉双:马到f8 (g6)
li-0FVDS命名标签 (格·N)战术主题
捉双:一子同时攻击两个目标——无法两全。
难度2179 ShuffleRating——专家水平——很少有人一次解出。
白方走棋——找出最佳续着
How to recognize this tactic
A fork is one piece attacking two targets at once. Look for a knight, pawn or queen move that lands where it hits the king (or a bigger piece) and a second undefended unit on the same turn — the opponent can save only one.
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 f5, 车 f1, 马 g6, 兵 a2 b2 g2 c3 d4 h4。
黑方:王 b8, 后 b6, 车 e6 e8, 兵 h5 c6 a7 b7。
棋盘上有10枚白棋和8枚黑棋;该题局面出现在第27回合之后。
The position in numbers
Material is level — 23 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 b8.
It is White to move on move 27, with 44 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 6 pawns, Black 4. Files fully open (no pawns of either colour): e, f — natural highways for the rooks and queen.
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
27. Nf8 Rd6 28. Nd7+ Rxd7 29. Qxd7
为何奏效
- 好棋!马到f8保持压力(+4.6)。
- 好棋!马到d7保持压力(+4.5)。
- 好棋!后到d7保持压力(+4.7)。
- 你获得制胜局面(+4.7)。
- 若改走Rd6,则Nd7+,你仍占优。
Move by move
- 27. Nf8 — 马 to f8
- Rd6 — 车 to d6
- 28. Nd7+ — 马 to d7 with check
- Rxd7 — 车 to d7 (capture)
- 29. Qxd7 — 后 to d7 (capture)
本题的题型
静着
既不将军也不吃子——但正是这步不起眼的棋决定了胜负。
静着:既不将军也不吃子,却恰恰是它决定胜负——制造无法招架的威胁,或夺走国王最后的格子。这是最难的一类着法:眼睛总在搜寻轰鸣的重击,赢棋的却是一次低调的挪动。线索:所有强制尝试都撞上防守——那就找那步单纯加强威胁或抢占格子的棋。训练自己发问:如果不吃不将,只是静静地加强,会怎样?
来源
源自 Lichess 题库(CC0)。
题包 015
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