Xuanxuan Qijing · Problem 10
Xuanxuan Qijing · Problem 10. Go, Black to play. Study 9 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 · P2
This move captures 0 stones. After captures, the connected group containing the new stone has 2 stones and 2 liberties: P1, Q1. Diagonal neighbours are not part of the same group. More than one liberty does not by itself establish life; examine the next move.
2. White · O3
This move captures 0 stones. After captures, the connected group containing the new stone has 7 stones and 4 liberties: N2, N4, N5, O1. 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 · Q1
This move captures 0 stones. After captures, the connected group containing the new stone has 3 stones and 2 liberties: P1, R1. 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 · O1
This move captures 0 stones. After captures, the connected group containing the new stone has 8 stones and 5 liberties: N1, P1, N2, N4, N5. 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 (9 plies)
Coordinates match this board: letters left to right, row numbers from top to bottom. These are board coordinates, not traditional score notation.
- Black
P2 - White
O3 - Black
Q1 - White
O1 - Black
N5 - White
P1 - Black
R1 - White
S1 - Black
Q2