吃掉无保护的后（d7）
li-06ZHc战术主题
悬子：对方有棋子无人保护——吃掉它。
难度1691 ShuffleRating——适合进阶战术爱好者。
白方走棋——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 d8, 象 a3 f3, 兵 b2 f2 g2 h3。
黑方：王 g8, 后 g6, 象 f8, 马 d7, 兵 h5 b6 f7 g7。
棋盘上有8枚白棋和8枚黑棋；该题局面出现在第32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 g1, the black king on g8.
It is White to move on move 32, with 34 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, d, e — natural highways for the rooks and queen.
White hold the bishop pair, an edge in open lines. The White king has 3 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. Qxd7 Bxa3 33. bxa3
为何奏效
- 好棋！后到d7保持压力（+5.0）。
- 好棋！兵到a3保持压力（+5.5）。
- 你赢得一子——象。
- 若改走Bxa3，则bxa3，你赢得象。
Move by move
- 32. Qxd7 — 后 to d7 (capture)
- Bxa3 — 象 to a3 (capture)
- 33. bxa3 — 兵 to a3 (capture)
本题的题型
制胜一击
找到那记强制得子的妙击。
制胜一击：强制赢得子力，却不归入任何单一的教科书主题。通用的战术配方在此适用：找出无保护的棋子、站位别扭的国王、超载的线路。按力度顺序枚举强制着法：将军、吃子、威胁——绝大多数组合正是从其中之一开始。不要凭感觉评估：把具体变化算到结果确凿无疑为止。
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 013
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