闪击:后到a1
li-0Ci7D战术主题
闪击:一子闪开,另一子的攻击随之而来。
难度1936 ShuffleRating——适合进阶战术爱好者。
黑方走棋——找出最佳续着
How to recognize this tactic
A discovered attack fires when one piece steps aside and unmasks the piece behind it. Look for your own units that block a rook, bishop or queen: moving the front piece — ideally with a threat of its own — springs two attacks in one move.
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 c1, 后 h7, 车 f1 c2, 兵 a2 e3 h3 g4 d5。
黑方:王 d8, 后 c3, 车 c8, 象 f6, 兵 a5 d6 b7 e7。
棋盘上有9枚白棋和8枚黑棋;该题局面出现在第31回合之后。
The position in numbers
White are ahead by 3 points of material (24 against 21; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on c1, the black king on d8.
It is Black to move on move 31, with 36 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 5 pawns, Black 4. Files fully open (no pawns of either colour): c, f — natural highways for the rooks and queen. Half-open for Black: g, h.
The Black 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
31... Qa1+ 32. Kd2 Rxc2+ 33. Qxc2 Qxf1
为何奏效
- 好棋!后到a1保持压力(+4.8)。
- 好棋!车到c2保持压力(+5.0)。
- 好棋!后到f1保持压力(+5.0)。
- 你赢得一子——车。
- 若改走Kd2,则Rxc2+,你赢得车。
Move by move
- 31… Qa1+ — 后 to a1 with check
- 32. Kd2 — 王 to d2
- Rxc2+ — 车 to c2 (capture) with check
- 33. Qxc2 — 后 to c2 (capture)
- Qxf1 — 后 to f1 (capture)
本题的题型
绝对牵制
一个子被牵制在王前——按规则它根本不能动。
绝对牵制:一个棋子被冻结在自己国王与你的远程棋子之间的直线上——按规则它根本不许移动。特征是三个单位排在一条直线上:你的象、车或后,敌方棋子,以及它身后的敌方国王。被牵制的棋子既不能进攻也不能防守,就当它不在棋盘上。放心地再次攻击它,最好用兵——它无权逃跑。
闪击
一个子闪开,让后面的子发起第二重攻击。
闪击就像拉开幕布:一个棋子离开直线,露出身后的远程棋子发动打击。妙处在于,走开的那个棋子自己还能攻击第二个目标——一步棋,两记重拳。检查你的叠置组合:马或兵的身后站着象或车,透过它们瞄准对方值钱的东西。前面的棋子要跳到最有攻击性的格子——没有第二威胁的闪击损失一半威力。
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 014
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