牵制：王到f3
li-02Nig战术主题
牵制：棋子一动，身后更有价值的目标就会暴露。
解救棋子：你的棋子正受攻击——找到最佳解救方法。
难度1827 ShuffleRating——适合进阶战术爱好者。
黑方走棋——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.
Here the task is defensive: one of your pieces is under attack and must be rescued without losing more. Look for a move that saves it with tempo — a counter-check, an equal counter-attack or an interposition — rather than a passive retreat.
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 b8, 兵 a2 b2 c4。
黑方：王 f4, 车 f5, 象 e3, 兵 a4 c6 g6 b7。
棋盘上有5枚白棋和7枚黑棋；该题局面出现在第42回合之后。
The position in numbers
Material is level — 12 points of pieces on each side (pawn = 1, knight and bishop = 3, rook = 5, queen = 9).
The white king stands on h1, the black king on f4.
It is Black to move on move 42, with 5 legal replies to weigh — only the line that keeps the advantage solves the puzzle. Black are in check right now, so every reply must answer the check.
White keeps 3 pawns, Black 4. Files fully open (no pawns of either colour): d, e, f, h — natural highways for the rooks and queen.
The Black king has 4 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
42... Kf3 43. Qh2 Rh5 44. Qxh5+ gxh5
为何奏效
- 好棋！王到f3保持压力（+6.1）。
- 好棋！车到h5保持压力（+9.9）。
- 好棋！兵到h5保持压力（#15）。
- 你赢得一子——后。
- 若改走Qh2，则Rh5，你仍占优。
Move by move
- 42… Kf3 — 王 to f3
- 43. Qh2 — 后 to h2
- Rh5 — 车 to h5
- 44. Qxh5+ — 后 to h5 (capture) with check
- gxh5 — 兵 to h5 (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。
通路兵
通路兵已无人能挡——护送它冲到底线。
通路兵：前方和相邻两列都没有敌兵的兵——能拦住它的只有棋子。查一查谁能堵在它路上、谁的王能追上它——如果谁也不能，它就值一整个子。推进通路兵要有棋子支援，车要放在它身后。新手的错误是毫无支援地把兵直推到对方嘴边。
救子
被攻击的子不但能救，还能顺手赚一笔。
救子：你的棋子被攻击，任务是别白白送掉它。办法有几种：带节奏地撤退、加以保护、垫挡攻击，或制造更凶的对攻威胁。机械后撤之前，先找带反击的撤退——既救了子又赚了时间。典型错误是惊慌失措逃到随便一个格子，结果棋子又被抓住。
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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