牵制：后到f3
li-0INzU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2089 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 h1, 后 b3, 车 g1, 象 b5, 兵 a2 b2 c2 g2 h2。
黑方：王 b7, 后 e6, 车 d2 e8, 兵 b6 g6 a7 f7 h7。
棋盘上有9枚白棋和9枚黑棋；该题局面出现在第28回合之后。
The position in numbers
Black are ahead by 2 points of material (22 against 24; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on h1, the black king on b7.
It is White to move on move 28, with 35 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
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 White: f.
The White king has 0 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
28. Qf3+ Qe4 29. Bxe8 Qxf3 30. gxf3
为何奏效
- 好棋！后到f3保持压力（+4.2）。
- 好棋！象到e8保持压力（+4.3）。
- 好棋！兵到f3保持压力（+4.3）。
- 你赢得一子——后。
- 若改走Qe4，则Bxe8，你赢得车。
Move by move
- 28. Qf3+ — 后 to f3 with check
- Qe4 — 后 to e4
- 29. Bxe8 — 象 to e8 (capture)
- Qxf3 — 后 to f3 (capture)
- 30. gxf3 — 兵 to f3 (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。
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
相似题目
在浏览器或 Android 应用中。无需安装 · 免费，无广告