牵制：王到g4
li-0KAge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2117 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 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 h4, 后 f7, 车 e8, 兵 a2 b2 g2 h3。
黑方：王 h8, 后 h6, 车 f8, 兵 c6 a7 b7 g7 h7。
棋盘上有7枚白棋和8枚黑棋；该题局面出现在第31回合之后。
The position in numbers
Black are ahead by 1 points of material (18 against 19; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on h4, the black king on h8.
It is White to move on move 31, with 3 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 4 pawns, Black 5. Files fully open (no pawns of either colour): d, e, f — natural highways for the rooks and queen. Half-open for White: c.
The White king has 2 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. Kg4 Qg6+ 32. Qxg6 hxg6 33. Rxf8+
为何奏效
- 好棋！王到g4保持压力（+8.3）。
- 好棋！后到g6保持压力（+8.3）。
- 好棋！车到f8保持压力（+8.3）。
- 你赢得一子——后。
- 若改走Qg6+，则Qxg6，你赢得后。
Move by move
- 31. Kg4 — 王 to g4
- Qg6+ — 后 to g6 with check
- 32. Qxg6 — 后 to g6 (capture)
- hxg6 — 兵 to g6 (capture)
- 33. Rxf8+ — 车 to f8 (capture) with check
本题的题型
围猎被牵制子
被牵制的子逃不掉——再次攻击它，把它拿下。
被牵制的棋子无法逃跑——这意味着只要再攻击它一次，就能整个赢下它。数一数攻击者和防守者：如果进攻方更多，这个子就是你的了。最好的「第二攻击者」是兵：它比它能吃到的任何东西都便宜。别急着立刻吃——先加强压力，然后再收割。
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。
简化
换掉重子，把局面导入赢定的残局。
简化是兑现优势的技术：兑掉后和车，你就掐灭了对方的反扑，把对局引入赢定的残局。规则简单：子力占优的一方兑子，但保兵。当子力已经赢到手、对手还在虚张声势时，就去找兑换。错误做法是回避兑后，任由对手用没完没了的威胁搅浑水。
来源
源自 Lichess 题库（CC0）。
题包 015
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