困住兵（e5）
li-0LSEq战术主题
困子：对方棋子无处可逃——抓住它。
难度2039 ShuffleRating——专家水平——很少有人一次解出。
白方走棋——找出最佳续着
How to recognize this tactic
A trapped piece has no safe square. Spot an enemy piece that has wandered offside or been hemmed in, then play the move that takes away its last escape and wins it — often a quiet pawn push or a covering minor piece.
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 e3, 车 d1 f1, 象 b2, 兵 c2 a3 f3 g3 h3 b4 d4 f4。
黑方：王 g8, 后 c7, 车 e8 f8, 象 e5, 马 e4, 兵 b5 d5 a6 c6 e6 h6 f7 g7。
棋盘上有13枚白棋和14枚黑棋；该题局面出现在第28回合之后。
The position in numbers
Black are ahead by 3 points of material (30 against 33; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on g2, the black king on g8.
It is White to move on move 28, with 35 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 8 pawns, Black 8. No file is fully open, so the heavy pieces have to be pried in. Half-open for White: e.
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
28. dxe5 Nxg3 29. Kxg3
为何奏效
- 好棋！兵到e5保持压力（+3.9）。
- 好棋！王到g3保持压力（+4.0）。
- 你赢得一子——象。
- 若改走Nxg3，则Kxg3，你赢得象。
Move by move
- 28. dxe5 — 兵 to e5 (capture)
- Nxg3 — 马 to g3 (capture)
- 29. Kxg3 — 王 to g3 (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）。
题包 014
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