牵制：后到g6 (h5)
li-0HZCe命名标签 (格·N)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2227 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.
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 h5, 车 a1 f1, 象 c1 b3, 马 h2, 兵 b2 c2 f2 g2 a3 d3 h3 e4。
黑方：王 g8, 后 h4, 车 a8 f8, 象 c5 c8, 马 g6, 兵 e5 a6 c6 d6 h6 b7 f7 g7。
棋盘上有15枚白棋和15枚黑棋；该题局面出现在第14回合之后。
The position in numbers
Material is level — 36 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 White to move on move 14, with 34 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 8 pawns, Black 8. No file is fully open, so the heavy pieces have to be pried in.
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
14. Qxg6 d5 15. Nf3
为何奏效
- 好棋！后到g6保持压力（+3.5）。
- 好棋！马到f3保持压力（+3.9）。
- 你赢得一子——马。
- 若改走d5，则Nf3，你赢得马。
Move by move
- 14. Qxg6 — 后 to g6 (capture)
- d5 — 兵 to d5
- 15. Nf3 — 马 to f3
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 015
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