捉双:后到f3 (f5)
li-05bjN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1463 ShuffleRating——俱乐部棋手水平。
黑方走棋——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 g2, 后 d4, 车 c1 c2, 马 b3, 兵 f2 a3 g3 h3 b4 e5。
黑方:王 g8, 后 f5, 车 e8 f8, 象 d7, 兵 b5 d5 a6 e6 g7 h7。
棋盘上有11枚白棋和11枚黑棋;该题局面出现在第32回合之后。
The position in numbers
Material is level — 28 points of pieces on each side (pawn = 1, knight and bishop = 3, rook = 5, queen = 9).
The white king stands on g2, the black king on g8.
It is Black to move on move 32, with 30 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 6 pawns, Black 6. Files fully open (no pawns of either colour): c — natural highways for the rooks and queen. Half-open for Black: f.
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
32... Qf3+ 33. Kh2 Qxb3
为何奏效
- 好棋!后到f3保持压力(+3.4)。
- 好棋!后到b3保持压力(+3.2)。
- 你赢得一子——马。
- 若改走Kh2,则Qxb3,你赢得马。
Move by move
- 32… Qf3+ — 后 to f3 with check
- 33. Kh2 — 王 to h2
- Qxb3 — 后 to b3 (capture)
本题的题型
王室捉双
带将军的捉双:王必须躲开,另一个子就丢了。
王家捉双是带将军的捉双:两个目标之一是国王本身。国王必须首先应将,因此没有人、也没有时间去救第二个棋子。寻找这样的格子:你的棋子从那里将军,同时攻击无保护的后或车。这是最可靠的捉双——对手根本没有选择的余地。
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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