吃掉无保护的王（h7） (g8·2)
li-0DOyt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2020 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 g1, 后 d1, 车 a1 f1, 象 c1 h7, 马 f3, 兵 a2 b2 f2 g2 h2。
黑方：王 g8, 后 e7, 车 a8 f8, 象 g4, 马 c6 d6, 兵 a7 b7 c7 f7 g7。
棋盘上有12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
Material is level — 33 points of pieces on each side (pawn = 1, knight and bishop = 3, rook = 5, queen = 9).
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 5 pawns, Black 5. Files fully open (no pawns of either colour): d, e — natural highways for the rooks and queen. Half-open for Black: h.
White hold the bishop pair, an edge in open lines. 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+ Qxg5 15. Bxg5 Bxd1
为何奏效
- 好棋！王到h7保持压力（+4.7）。
- 好棋！后到g5保持压力（+4.7）。
- 好棋！象到d1保持压力（+4.8）。
- 你赢得一子——后。
- 若改走Ng5+，则Qxg5，你赢得象。
Move by move
- 13… Kxh7 — 王 to h7 (capture)
- 14. Ng5+ — 马 to g5 with check
- Qxg5 — 后 to g5 (capture)
- 15. Bxg5 — 象 to g5 (capture)
- Bxd1 — 象 to d1 (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。
来源
源自 Lichess 题库（CC0）。
题包 014
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