Xuanxuan Qijing Problem 7: Black to play and kill
玄玄棋经 · Problem 7 of 347 · Placement at the centre of the eye shape
White already has an eye in the corner. Where would the second one be, and can Black get there first?
How to solve it
White has one eye in the corner and hopes for a second in the centre. Black strikes at the centre of that shape with E16.
White takes the corner eye with C19 and Black connects at D18. When White tries for the second eye with G15, Black's F16 destroys it, and after White's A16, Black's A18 holds the corner to a single eye.
Attacking from the outside first does not work: White answers G15 with G16, and F14 with F15.
Main line
- 1. Black E16
- 2. White C19
- 3. Black D18
- 4. White G15
- 5. Black F16
- 6. White A16
- 7. Black A18
Solution checked against Sensei's Library.
Play it out on the board
Place the stones yourself and see the refutation when you miss. All the Xuanxuan Qijing problems as quick lessons.