吃掉无保护的后（d1）
li-04Ncg战术主题
悬子：对方有棋子无人保护——吃掉它。
难度1315 ShuffleRating——俱乐部棋手水平。
黑方走棋——找出最佳续着
How to recognize this tactic
A hanging piece is one that is attacked and not defended, or defended too few times. Count attackers against defenders on each enemy unit; where attackers win, take it — often with an in-between move or a check to gain the extra tempo.
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 g5, 车 d1 h1, 象 g2, 马 h5, 兵 g3 h4 f6。
黑方：王 g8, 后 c2, 车 b8 f8, 兵 a5 d5 e6 g6 c7 h7。
棋盘上有9枚白棋和10枚黑棋；该题局面出现在第32回合之后。
The position in numbers
White are ahead by 3 points of material (28 against 25; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on g1, the black king on g8.
It is Black to move on move 32, with 42 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 3 pawns, Black 6. Files fully open (no pawns of either colour): b — 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... Qxd1+ 33. Kh2 Qxh5
为何奏效
- 好棋！后到d1保持压力（+3.9）。
- 好棋！后到h5保持压力（+4.3）。
- 你赢得一子——车。
- 若改走Kh2，则Qxh5，你赢得车。
Move by move
- 32… Qxd1+ — 后 to d1 (capture) with check
- 33. Kh2 — 王 to h2
- Qxh5 — 后 to h5 (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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