Xuanxuan Qijing · Problem 31
Xuanxuan Qijing · Problem 31. Go, White to play. Study 11 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. White · S2
This move captures 0 stones. After captures, the connected group containing the new stone has 1 stones and 3 liberties: S1, S3, R2. Diagonal neighbours are not part of the same group. More than one liberty does not by itself establish life; examine the next move.
2. Black · R5
This move captures 0 stones. After captures, the connected group containing the new stone has 3 stones and 5 liberties: S5, Q4, P5, R3, S4. Diagonal neighbours are not part of the same group. More than one liberty does not by itself establish life; examine the next move.
3. White · S5
This move captures 0 stones. After captures, the connected group containing the new stone has 1 stones and 2 liberties: S4, S6. Diagonal neighbours are not part of the same group. More than one liberty does not by itself establish life; examine the next move.
4. Black · S4
This move captures 0 stones. After captures, the connected group containing the new stone has 4 stones and 4 liberties: S3, R3, Q4, P5. 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 · 5 black stones · 9 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 (11 plies)
Coordinates match this board: letters left to right, row numbers from top to bottom. These are board coordinates, not traditional score notation.
- White
S2 - Black
R5 - White
S5 - Black
S4 - White
P5 - Black
R2 - White
S3 - Black
P2 - White
P1 - Black
Q1 - White
S1