解救王到b3
li-05iRm战术主题
解救棋子:你的棋子正受攻击——找到最佳解救方法。
难度1436 ShuffleRating——俱乐部棋手水平。
黑方走棋——找出最佳续着
How to recognize this tactic
Here the task is defensive: one of your pieces is under attack and must be rescued without losing more. Look for a move that saves it with tempo — a counter-check, an equal counter-attack or an interposition — rather than a passive retreat.
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 d2, 车 a5。
黑方:王 a2, 兵 b2 c6 g7。
棋盘上有2枚白棋和4枚黑棋;该题局面出现在第43回合之后。
The position in numbers
White are ahead by 2 points of material (5 against 3; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on d2, the black king on a2.
It is Black to move on move 43, with 2 legal replies to weigh — only the line that keeps the advantage solves the puzzle. Black are in check right now, so every reply must answer the check.
White keeps 0 pawns, Black 3. Files fully open (no pawns of either colour): a, d, e, f, h — natural highways for the rooks and queen.
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
43... Kb3 44. Ra7 b1=Q 45. Rb7+ Ka2
为何奏效
- 好棋!王到b3保持压力(+4.7)。
- 好棋!兵到b1保持压力(+6.2)。
- 好棋!王到a2保持压力(+6.3)。
- 你赢得决定性子力(+6.3)。
- 若改走Ra7,则b1=Q,你赢得兵。
Move by move
- 43… Kb3 — 王 to b3
- 44. Ra7 — 车 to a7
- b1=Q — 兵 to b1
- 45. Rb7+ — 车 to b7 with check
- Ka2 — 王 to a2
本题的题型
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。
通路兵
通路兵已无人能挡——护送它冲到底线。
通路兵:前方和相邻两列都没有敌兵的兵——能拦住它的只有棋子。查一查谁能堵在它路上、谁的王能追上它——如果谁也不能,它就值一整个子。推进通路兵要有棋子支援,车要放在它身后。新手的错误是毫无支援地把兵直推到对方嘴边。
解杀
杀棋已成威胁——化解它并保持优势。
解杀:对手离将杀只差一步——但现在轮到你走,这改变了一切。寻找既解除杀棋威胁又保住你优势的防守:常常是一步将军或反威胁,让对方腾不出手来做杀。先准确说出对方要在哪个格子将杀你——否则就是蒙着眼防守。错误做法是走一步实际并没有解除威胁的「防守」。
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 011
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