吃掉无保护的象（a8）
li-08COQ战术主题
悬子：对方有棋子无人保护——吃掉它。
难度1684 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 hanging piece is one that is attacked and not defended, or defended too few times. Count attackers against defenders on each enemy unit; where attackers win, take it — often with an in-between move or a check to gain the extra tempo.
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 h2, 车 c7 a8, 象 b3, 兵 a2 b2 g3 h4。
黑方：王 h8, 车 d4 g6, 象 e4, 兵 f5 h5 g7。
棋盘上有8枚白棋和7枚黑棋；该题局面出现在第34回合之后。
The position in numbers
White are ahead by 1 points of material (17 against 16; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on h2, the black king on h8.
It is Black to move on move 34, with 3 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 4 pawns, Black 3. Files fully open (no pawns of either colour): c, d, e — natural highways for the rooks and queen. Half-open for Black: a, b.
The Black king has 1 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
34... Bxa8 35. Rc8+ Kh7
为何奏效
- 好棋！象到a8保持压力（+4.7）。
- 好棋！王到h7保持压力（+4.5）。
- 你赢得一子——车。
- 若改走Rc8+，则Kh7，你赢得车。
Move by move
- 34… Bxa8 — 象 to a8 (capture)
- 35. Rc8+ — 车 to c8 with check
- Kh7 — 王 to h7
本题的题型
制胜一击
找到那记强制得子的妙击。
制胜一击：强制赢得子力，却不归入任何单一的教科书主题。通用的战术配方在此适用：找出无保护的棋子、站位别扭的国王、超载的线路。按力度顺序枚举强制着法：将军、吃子、威胁——绝大多数组合正是从其中之一开始。不要凭感觉评估：把具体变化算到结果确凿无疑为止。
残局战术
残局里同样有战术——子力稀少时照样出击。
战术不会随着后的兑换而退休：捉双、牵制和双重攻击在残局里照样活跃。子力所剩无几，因此这里每一次战术损失几乎都直接定胜负。特征还是老几样：无保护的棋子、王与棋子同线、即将升变的兵。建议：即使在「纯技术」残局里，每步棋前也要搜一遍战术——自己的和对方的。
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 013
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