捉双:后到d7
li-02IbZ战术主题
捉双:一子同时攻击两个目标——无法两全。
难度952 ShuffleRating——适合初学者迈出Chess960战术的第一步。
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 f1, 后 d2, 车 d1, 兵 b2 f2 h2 c3 g3。
黑方:王 e7, 后 a2, 车 c8, 兵 e6 h6 a7 f7 g7。
棋盘上有8枚白棋和8枚黑棋;该题局面出现在第31回合之后。
The position in numbers
Material is level — 19 points of pieces on each side (pawn = 1, knight and bishop = 3, rook = 5, queen = 9).
The white king stands on f1, the black king on e7.
It is White to move on move 31, with 30 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): d — natural highways for the rooks and queen. Half-open for White: a, e.
The White king has 4 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. Qd7+ Kf6 32. Qxc8
为何奏效
- 好棋!后到d7保持压力(+5.7)。
- 好棋!后到c8保持压力(+5.6)。
- 你赢得一子——车。
- 若改走Kf6,则Qxc8,你赢得车。
Move by move
- 31. Qd7+ — 后 to d7 with check
- Kf6 — 王 to f6
- 32. Qxc8 — 后 to c8 (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 005
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