捉双:象到c5 (e7·2)
li-0LGoj命名标签 (格·N)战术主题
闪击:一子闪开,另一子的攻击随之而来。
捉双:一子同时攻击两个目标——无法两全。
难度1991 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.
A fork is one piece attacking two targets at once. Look for a knight, pawn or queen move that lands where it hits the king (or a bigger piece) and a second undefended unit on the same turn — the opponent can save only one.
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 h3, 车 e1 f1, 象 d3, 马 b5, 兵 a2 b2 g2 h2 c4 e4 d5。
黑方:王 g8, 后 h6, 车 f8, 象 e7 c8, 马 g4, 兵 e5 b6 g6 a7 c7 f7。
棋盘上有13枚白棋和12枚黑棋;该题局面出现在第22回合之后。
The position in numbers
White are ahead by 3 points of material (32 against 29; 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 Black to move on move 22, with 40 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 7 pawns, Black 6. No file is fully open, so the heavy pieces have to be pried in. Half-open for Black: d, h.
Black hold the bishop pair, an edge in open lines. 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
22... Bc5+ 23. Kh1 Nf2+ 24. Rxf2 Bxh3
为何奏效
- 好棋!象到c5保持压力(+4.5)。
- 好棋!马到f2保持压力(+4.7)。
- 好棋!象到h3保持压力(+4.9)。
- 你赢得一子——后。
- 若改走Kh1,则Nf2+,你仍占优。
Move by move
- 22… Bc5+ — 象 to c5 with check
- 23. Kh1 — 王 to h1
- Nf2+ — 马 to f2 with check
- 24. Rxf2 — 车 to f2 (capture)
- Bxh3 — 象 to h3 (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。
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。
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。
来源
源自 Lichess 题库(CC0)。
题包 014
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