牵制：车到h2
li-03csE战术主题
牵制：棋子一动，身后更有价值的目标就会暴露。
难度1819 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 pin freezes a piece in front of a more valuable one behind it. Scan the ranks, files and diagonals your bishop, rook or queen controls: if an enemy piece cannot move without exposing its king or queen, it is pinned and can be piled on or bypassed.
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 h1, 后 c2, 车 g2, 兵 a2 b3。
黑方：王 h7, 后 h3, 车 g6, 兵 a7 f7 g7。
棋盘上有5枚白棋和6枚黑棋；该题局面出现在第41回合之后。
The position in numbers
Black are ahead by 1 points of material (16 against 17; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on h1, the black king on h7.
It is White to move on move 41, with 2 legal replies to weigh — only the line that keeps the advantage solves the puzzle. White are in check right now, so every reply must answer the check.
White keeps 2 pawns, Black 3. Files fully open (no pawns of either colour): c, d, e, h — natural highways for the rooks and queen. Half-open for White: f, g.
The White king has 1 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
41. Rh2 Qxh2+ 42. Kxh2
为何奏效
- 好棋！车到h2保持压力（+3.8）。
- 好棋！王到h2保持压力（+4.0）。
- 你赢得一子——后。
- 若改走Qxh2+，则Kxh2，你赢得后。
Move by move
- 41. Rh2 — 车 to h2
- Qxh2+ — 后 to h2 (capture) with check
- 42. Kxh2 — 王 to h2 (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。
挡将救局
带先手挡将——一举扭转局面。
垫将：你用棋子挡住将军，但不是消极地挡，而是带节奏地挡——垫挡的棋子自己制造威胁。这样的垫挡把防守变成进攻。被将军时比较全部三种应法：吃、走王、垫挡——并在垫挡中寻找带反威胁的那一步。错误做法是本可用积极垫挡扭转局面时，机械地走王了事。
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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