吃掉无保护的车（f3） (f8)
li-0VDIc命名标签 (格·N)战术主题
悬子：对方有棋子无人保护——吃掉它。
难度2143 ShuffleRating——专家水平——很少有人一次解出。
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 h2, 后 g5, 车 g1 e2, 象 f3, 兵 a2 d3 e4 d5 h5。
黑方：王 g8, 后 c3, 车 e8 f8, 象 b7, 兵 c5 b6 d6 a7 g7。
棋盘上有10枚白棋和10枚黑棋；该题局面出现在第31回合之后。
The position in numbers
Material is level — 27 points of pieces on each side (pawn = 1, knight and bishop = 3, rook = 5, queen = 9).
The white king stands on h2, the black king on g8.
It is Black to move on move 31, with 41 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 5 pawns, Black 5. Files fully open (no pawns of either colour): f — natural highways for the rooks and queen. Half-open for Black: e, h.
The Black 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
31... Rxf3 32. e5 Rf7 33. e6 Rfe7
为何奏效
- 好棋！车到f3保持压力（+1.6）。
- 好棋！车到f7保持压力（+1.6）。
- 好棋！车到e7保持压力（+1.6）。
- 你赢得一子——象。
- 若改走e5，则Rf7，你赢得象。
Move by move
- 31… Rxf3 — 车 to f3 (capture)
- 32. e5 — 兵 to e5
- Rf7 — 车 to f7
- 33. e6 — 兵 to e6
- Rfe7 — 车 to e7
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 015
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