捉双:后到d3
li-04zR1战术主题
捉双:一子同时攻击两个目标——无法两全。
难度1288 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 g2, 后 f3, 车 d1, 兵 b2 d4 h4 g5。
黑方:王 g6, 后 d6, 车 b5, 兵 b3 d5 h5 f7。
棋盘上有7枚白棋和7枚黑棋;该题局面出现在第43回合之后。
The position in numbers
Material is level — 18 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 g6.
It is White to move on move 43, with 31 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 4 pawns, Black 4. Files fully open (no pawns of either colour): a, c, e — natural highways for the rooks and queen. Half-open for White: f.
The White king has 5 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
43. Qd3+ Kg7 44. Qxb5
为何奏效
- 好棋!后到d3保持压力(+5.1)。
- 好棋!后到b5保持压力(+5.6)。
- 你赢得一子——车。
- 若改走Kg7,则Qxb5,你赢得车。
Move by move
- 43. Qd3+ — 后 to d3 with check
- Kg7 — 王 to g7
- 44. Qxb5 — 后 to b5 (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 009
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