捉双:后到e4 (e8)
li-0GnYn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1926 ShuffleRating——适合进阶战术爱好者。
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 b1, 后 b3, 车 a1 h1, 象 c1 c4, 马 e2, 兵 b2 h3 a4 f4。
黑方:王 c8, 后 e8, 车 d8 h8, 象 d7, 马 h5, 兵 e3 c5 c6 f6 a7 b7 h7。
棋盘上有11枚白棋和13枚黑棋;该题局面出现在第23回合之后。
The position in numbers
Material is level — 32 points of pieces on each side (pawn = 1, knight and bishop = 3, rook = 5, queen = 9).
The white king stands on b1, the black king on c8.
It is Black to move on move 23, with 25 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 4 pawns, Black 7. Files fully open (no pawns of either colour): d, g — natural highways for the rooks and queen.
White hold the bishop pair, an edge in open lines. 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
23... Qe4+ 24. Ka2 Qxh1
为何奏效
- 好棋!后到e4保持压力(+3.6)。
- 好棋!后到h1保持压力(+3.7)。
- 你赢得一子——车。
- 若改走Ka2,则Qxh1,你赢得车。
Move by move
- 23… Qe4+ — 后 to e4 with check
- 24. Ka2 — 王 to a2
- Qxh1 — 后 to h1 (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)。
题包 014
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