牵制:后到c7
li-09X8Z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2023 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 a3, 后 c2, 车 d1, 兵 b2。
黑方:王 h2, 后 h5, 车 g2, 兵 g6。
棋盘上有4枚白棋和4枚黑棋;该题局面出现在第57回合之后。
The position in numbers
Material is level — 15 points of pieces on each side (pawn = 1, knight and bishop = 3, rook = 5, queen = 9).
The white king stands on a3, the black king on h2.
It is White to move on move 57, with 38 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 1 pawns, Black 1. Files fully open (no pawns of either colour): a, c, d, e, f, h — natural highways for the rooks and queen. Half-open for White: g.
The White king has 4 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
57. Qc7+ Rg3+ 58. Rd3 Qa5+ 59. Qxa5
为何奏效
- 好棋!后到c7保持压力(+4.4)。
- 好棋!车到d3保持压力(+5.0)。
- 好棋!后到a5保持压力(+5.2)。
- 你赢得一子——后。
- 若改走Rg3+,则Rd3,你仍占优。
Move by move
- 57. Qc7+ — 后 to c7 with check
- Rg3+ — 车 to g3 with check
- 58. Rd3 — 车 to d3
- Qa5+ — 后 to a5 with check
- 59. Qxa5 — 后 to a5 (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。
后残局
开放棋盘上的皇后大战——精确高于一切。
后残局阴险难测:后无处不达,一个不准就把胜势变成长将和棋。主题特征:兵很少、王暴露、连环将军的味道飘在空中。提前把王藏好,并利用自己的将军带节奏地调后靠近、或推进通路兵。错误做法是只顾吃兵,把王丢给无穷无尽的将军。
来源
源自 Lichess 题库(CC0)。
题包 014
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