Xuanxuan Qijing · Problem 13
Xuanxuan Qijing · Problem 13. Go, White to play. Study 15 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 · R3
This move captures 0 stones. After captures, the connected group containing the new stone has 1 stones and 2 liberties: Q3, S3. 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 · S3
This move captures 0 stones. After captures, the connected group containing the new stone has 1 stones and 2 liberties: S2, 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 · S2
This move captures 0 stones. After captures, the connected group containing the new stone has 1 stones and 1 liberties: S1. Diagonal neighbours are not part of the same group. The resulting group is in atari.
4. Black · S1
This move captures 1 stone. After captures, the connected group containing the new stone has 1 stones and 2 liberties: S2, R1. 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 · 16 black stones · 10 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 (15 plies)
Coordinates match this board: letters left to right, row numbers from top to bottom. These are board coordinates, not traditional score notation.
- White
R3 - Black
S3 - White
S2 - Black
S1 - White
Q3 - Black
R5 - White
L3 - Black
L2 - White
M2 - Black
M1 - White
O2 - Black
O1 - White
R1 - Black
Q1 - White
P1