牵制:马到f3
li-00XL2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997 ShuffleRating——适合初学者迈出Chess960战术的第一步。
黑方走棋——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 d4, 车 a1 f1, 马 e2, 兵 a2 f2 g2 h3 b4 c4 d5。
黑方:王 c8, 后 g6, 车 d8 h8, 马 e5, 兵 e4 f5 a7 b7 c7 g7 h7。
棋盘上有12枚白棋和12枚黑棋;该题局面出现在第17回合之后。
The position in numbers
Material is level — 29 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 c8.
It is Black to move on move 17, with 42 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 7 pawns, Black 7. No file is fully open, so the heavy pieces have to be pried in. Half-open for Black: d.
The Black 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
17... Nf3+ 18. Kh1 Nxd4
为何奏效
- 好棋!马到f3保持压力(+5.5)。
- 好棋!马到d4保持压力(+5.7)。
- 你赢得一子——后。
- 若改走Kh1,则Nxd4,你赢得后。
Move by move
- 17… Nf3+ — 马 to f3 with check
- 18. Kh1 — 王 to h1
- Nxd4 — 马 to d4 (capture)
本题的题型
王室捉双
带将军的捉双:王必须躲开,另一个子就丢了。
王家捉双是带将军的捉双:两个目标之一是国王本身。国王必须首先应将,因此没有人、也没有时间去救第二个棋子。寻找这样的格子:你的棋子从那里将军,同时攻击无保护的后或车。这是最可靠的捉双——对手根本没有选择的余地。
来源
源自 Lichess 题库(CC0)。
经 Stockfish 深度 20+ 验证。
解法强制性已确认(verified)。
题包 006
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