牵制：车到h5
li-0Oj2w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2144 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 e4, 车 e1 h3, 兵 a2 b2 c2 f2 h2 g5 f6。
黑方：王 h7, 后 f8, 车 d7 d8, 兵 b4 a5 h5 e6 g6 c7 f7。
棋盘上有11枚白棋和11枚黑棋；该题局面出现在第30回合之后。
The position in numbers
Material is level — 26 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 h7.
It is White to move on move 30, with 46 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 7 pawns, Black 7. Files fully open (no pawns of either colour): d — natural highways for the rooks and queen. Half-open for White: 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
30. Rxh5+ Kg8 31. Rh6 Qxh6 32. gxh6
为何奏效
- 好棋！车到h5保持压力（+5.0）。
- 好棋！车到h6保持压力（+5.0）。
- 好棋！兵到h6保持压力（+5.1）。
- 你赢得一子——后。
- 若改走Kg8，则Rh6，你仍占优。
Move by move
- 30. Rxh5+ — 车 to h5 (capture) with check
- Kg8 — 王 to g8
- 31. Rh6 — 车 to h6
- Qxh6 — 后 to h6 (capture)
- 32. gxh6 — 兵 to h6 (capture)
本题的题型
围猎被牵制子
被牵制的子逃不掉——再次攻击它，把它拿下。
被牵制的棋子无法逃跑——这意味着只要再攻击它一次，就能整个赢下它。数一数攻击者和防守者：如果进攻方更多，这个子就是你的了。最好的「第二攻击者」是兵：它比它能吃到的任何东西都便宜。别急着立刻吃——先加强压力，然后再收割。
来源
源自 Lichess 题库（CC0）。
题包 015
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