3步杀:兵到g6 (g7)
li-06g3s命名标签 (格·N)战术主题
三步将杀:一段以将杀收尾的强制着法。
难度1611 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
In a mate in three every move must be forcing; the defender should never get a free tempo. Find the check or threat that herds the king, calculate the single defence to each, and confirm the net closes on the third 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 h5, 后 b8, 车 d8, 兵 c2 b3 a4 f5 g5。
黑方:王 f8, 后 e8, 车 e4, 兵 a5 b6 f7 g7。
棋盘上有8枚白棋和7枚黑棋;该题局面出现在第44回合之后。
The position in numbers
White are ahead by 1 points of material (19 against 18; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on h5, the black king on f8.
It is Black to move on move 44, with 19 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): d, e, h — natural highways for the rooks and queen. Half-open for Black: c.
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
44... g6+ 45. fxg6 fxg6+ 46. Kh6 Rh4#
为何奏效
- 好棋!兵到g6保持压力(#2)。
- 好棋!兵到g6保持压力(#1)。
- 好棋!车到h4保持压力(#)。
- 该变着以3步强制将杀结束。
- 若改走fxg6,则fxg6+,你仍占优。
Move by move
- 44… g6+ — 兵 to g6 with check
- 45. fxg6 — 兵 to g6 (capture)
- fxg6+ — 兵 to g6 (capture) with check
- 46. Kh6 — 王 to h6
- Rh4# — 车 to h4 and it is checkmate
本题的题型
三步杀
三步之内的强制将杀。
三步杀是一道强制的阶梯:你的每一步都收窄对手的选择,第三步画上句号。到将军和弃子中寻找开局之着:杀题里安静的首着虽少见,却格外阴险。脑中要有变化树:每种防守对应自己的分支。别在第二步就停下——最终的将杀图景必须亲眼算到。
唯一着法
其他任何一步都会输——找到唯一撑得住的那一步。
唯一着法:除了独一无二的那步棋,其余全输的局面。这里不能「顺手」下棋:把原则上不同的防守都过一遍——逃跑、垫挡、兑换、反击——再淘汰被驳倒的。这类题目的标志:显而易见的着法很快就输,而正解常常看起来古怪。先弄清威胁你的究竟是什么——那步唯一的防守自会现身。
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 012
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