吃掉无保护的王（g7）
li-0HSvH战术主题
悬子：对方有棋子无人保护——吃掉它。
难度1873 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 g1, 后 d1, 车 a1 f1, 象 c4 g7, 兵 a2 b2 c2 f2 g2 h2。
黑方：王 g8, 后 d8, 车 a8 f8, 象 c8, 马 e4, 兵 c6 a7 c7 d7 f7 h7。
棋盘上有12枚白棋和12枚黑棋；该题局面出现在第12回合之后。
The position in numbers
Material is level — 31 points of pieces on each side (pawn = 1, knight and bishop = 3, rook = 5, queen = 9).
The white king stands on g1, the black king on g8.
It is Black to move on move 12, with 25 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 6 pawns, Black 6. Files fully open (no pawns of either colour): e — natural highways for the rooks and queen. Half-open for Black: b, g.
White hold the bishop pair, an edge in open lines. 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
12... Kxg7 13. Qg4+ Ng5 14. f4 d5
为何奏效
- 好棋！王到g7保持压力（+2.8）。
- 好棋！马到g5保持压力（+2.8）。
- 好棋！兵到d5保持压力（+2.7）。
- 你赢得一子——象。
- 若改走Qg4+，则Ng5，你赢得象。
Move by move
- 12… Kxg7 — 王 to g7 (capture)
- 13. Qg4+ — 后 to g4 with check
- Ng5 — 马 to g5
- 14. f4 — 兵 to f4
- d5 — 兵 to d5
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。
来源
源自 Lichess 题库（CC0）。
题包 014
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