牵制:后到d8
li-0IgLj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1883 ShuffleRating——适合进阶战术爱好者。
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 d1, 象 e3, 兵 a2 f2 g2 c3 h3。
黑方:王 g8, 后 b2, 象 g7, 兵 b6 g6 a7 e7 f7 h7。
棋盘上有8枚白棋和9枚黑棋;该题局面出现在第23回合之后。
The position in numbers
Black are ahead by 1 points of material (17 against 18; 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 White to move on move 23, with 38 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 5 pawns, Black 6. Files fully open (no pawns of either colour): d — natural highways for the rooks and queen. Half-open for White: b, e.
The White king has 3 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
23. Qd8+ Bf8 24. Bh6 Qc1+ 25. Bxc1
为何奏效
- 好棋!后到d8保持压力(+8.1)。
- 好棋!象到h6保持压力(+8.1)。
- 好棋!象到c1保持压力(+8.2)。
- 你赢得一子——后。
- 若改走Bf8,则Bh6,你仍占优。
Move by move
- 23. Qd8+ — 后 to d8 with check
- Bf8 — 象 to f8
- 24. Bh6 — 象 to h6
- Qc1+ — 后 to c1 with check
- 25. Bxc1 — 象 to c1 (capture)
本题的题型
腾挪
带着先手把自己的子挪开,为决定性一击腾出线路。
让路:决定性打击被你自己的棋子挡住了——那就把它挪开,甚至干脆送掉。关键是带节奏地让路:闪开时带着将军、吃子或威胁,让对手来不及重新布防。识别特征:你看到后或车有一记好杀招,但需要的线路或格子被自己的棋子占着。别舍不得——让路的弃子通常比错失的攻势便宜得多。
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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