吃掉无保护的王（h7） (g8·3)
li-0HU3d命名标签 (格·N)战术主题
悬子：对方有棋子无人保护——吃掉它。
解救棋子：你的棋子正受攻击——找到最佳解救方法。
难度2473 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.
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 g1, 后 d1, 车 a1 f1, 象 c1 h7, 马 f3, 兵 f2 g2 h2 c3 a4 e5。
黑方：王 g8, 后 d8, 车 a8 f8, 象 c5 c8, 马 c6, 兵 e6 a7 b7 f7 g7。
棋盘上有13枚白棋和12枚黑棋；该题局面出现在第13回合之后。
The position in numbers
White are ahead by 1 points of material (34 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 g1, the black king on g8.
It is Black to move on move 13, with 2 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 6 pawns, Black 5. Files fully open (no pawns of either colour): d — natural highways for the rooks and queen. Half-open for Black: c, h.
The Black 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
13... Kxh7 14. Ng5+ Kg8 15. Qc2 g6
为何奏效
- 好棋！王到h7保持压力（+2.1）。
- 好棋！王到g8保持压力（+2.2）。
- 好棋！兵到g6保持压力（+2.2）。
- 你赢得一子——象。
- 若改走Ng5+，则Kg8，你赢得象。
Move by move
- 13… Kxh7 — 王 to h7 (capture)
- 14. Ng5+ — 马 to g5 with check
- Kg8 — 王 to g8
- 15. Qc2 — 后 to c2
- g6 — 兵 to g6
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。
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。
王的撤离
王迈开自己的脚步走出危险区。
国王撤离：掩体既已坍塌，王就徒步走出攻击区——有时要横穿半个棋盘。一连串精确的王着把他带出火力圈，对手的攻势随之消散。识别特征：没有一种直接防守管用，但存在一条经过安全格、通往棋盘僻静角落的路线。要提前算好全程——半路抛锚的王通常就死在半路。
来源
源自 Lichess 题库（CC0）。
题包 015
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