Xuanxuan Qijing · Problem 7
Xuanxuan Qijing · Problem 7. Go, Black to play. Study 7 reference plies, try both sides and branch from the replay.
Site coordinates run A–S left to right and 1–19 top to bottom; A1 is the top-left intersection.
Read the position, one decision at a time
Try the position first, then open the notes. They explain measurable changes in the reference, not every possible variation.
Reveal step-by-step explanations
1. Black · E16
This move captures 0 stones. After captures, the connected group containing the new stone has 1 stones and 1 liberties: F16. Diagonal neighbours are not part of the same group. The resulting group is in atari.
2. White · F16
This move captures 1 stone. After captures, the connected group containing the new stone has 4 stones and 3 liberties: F15, E16, G16. Diagonal neighbours are not part of the same group. More than one liberty does not by itself establish life; examine the next move.
3. Black · G15
This move captures 0 stones. After captures, the connected group containing the new stone has 1 stones and 2 liberties: G16, F15. Diagonal neighbours are not part of the same group. More than one liberty does not by itself establish life; examine the next move.
4. White · G16
This move captures 0 stones. After captures, the connected group containing the new stone has 7 stones and 2 liberties: F15, E16. Diagonal neighbours are not part of the same group. More than one liberty does not by itself establish life; examine the next move.
Understand this position
19 ranks × 19 files · 18 black stones · 13 white stones
Count the liberties of each connected group, not the empty points next to just one stone. Orthogonal contact connects; diagonal contact does not. Try your move, count captures and recount the resulting group’s liberties before comparing the reference.
Read the reference line (7 plies)
Coordinates match this board: letters left to right, row numbers from top to bottom. These are board coordinates, not traditional score notation.
- Black
E16 - White
F16 - Black
G15 - White
G16 - Black
F14 - White
F15 - Black
D15