牵制：车到d5 (d1)
li-05QPw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2369 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 h6, 车 a1 d1, 象 b2 c2, 马 g3, 兵 f2 g2 h2 a3 c5 e5。
黑方：王 g8, 后 b7, 车 a8 d8, 象 e7, 马 d5 c6, 兵 b4 b5 e6 g6 f7 h7。
棋盘上有13枚白棋和13枚黑棋；该题局面出现在第24回合之后。
The position in numbers
Material is level — 34 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 24, with 47 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 6 pawns, Black 6. Files fully open (no pawns of either colour): d — natural highways for the rooks and queen. Half-open for White: b.
White hold the bishop pair, an edge in open lines. The White 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
24. Rxd5 Bf8 25. Rxd8
为何奏效
- 好棋！车到d5保持压力（+3.8）。
- 好棋！车到d8保持压力（+3.5）。
- 你赢得一子——车。
- 若改走Bf8，则Rxd8，你赢得车。
Move by move
- 24. Rxd5 — 车 to d5 (capture)
- Bf8 — 象 to f8
- 25. Rxd8 — 车 to d8 (capture)
本题的题型
车的捉双
车沿横线和直线同时攻击两个目标。
车的捉双：车从一个格子同时攻击两个目标——一个沿直线，一个沿横线。寻找呈「直角」摆放的敌方棋子：从某个安全格上，两者都在车的射程之内。这在残局中尤其常见：车一边将军，一边顺路捞取悬子和兵。检验你每一步车的将军：它是否顺带打到另一条线上有价值的东西？
来源
源自 Lichess 题库（CC0）。
题包 015
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