捉双:后到c4
li-01F1N战术主题
捉双:一子同时攻击两个目标——无法两全。
难度1185 ShuffleRating——俱乐部棋手水平。
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 g1, 后 f4, 车 e1 f1, 马 d2, 兵 a2 b2 f2 g2 c3 h3 f5。
黑方:王 g8, 后 d7, 车 a8 f8, 马 d3, 兵 c5 d6 f6 a7 b7 g7 h7。
棋盘上有12枚白棋和12枚黑棋;该题局面出现在第18回合之后。
The position in numbers
Material is level — 29 points of pieces on each side (pawn = 1, knight and bishop = 3, rook = 5, queen = 9).
The white king stands on g1, the black king on g8.
It is White to move on move 18, with 42 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 7 pawns, Black 7. Files fully open (no pawns of either colour): e — natural highways for the rooks and queen. Half-open for White: d.
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
18. Qc4+ d5 19. Qxd3
为何奏效
- 好棋!后到c4保持压力(+5.0)。
- 好棋!后到d3保持压力(+5.0)。
- 你赢得一子——马。
- 若改走d5,则Qxd3,你赢得马。
Move by move
- 18. Qc4+ — 后 to c4 with check
- d5 — 兵 to d5
- 19. Qxd3 — 后 to d3 (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 007
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