Xuanxuan Qijing · Problem 1
Xuanxuan Qijing · Problem 1. 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 · J10
This move captures 0 stones. After captures, the connected group containing the new stone has 2 stones and 5 liberties: J9, I10, J12, I11, K11. 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 · K9
This move captures 0 stones. After captures, the connected group containing the new stone has 2 stones and 5 liberties: K8, J9, L9, K11, L10. 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 · I11
This move captures 0 stones. After captures, the connected group containing the new stone has 3 stones and 5 liberties: I10, H11, J12, K11, J9. 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 · H12
This move captures 0 stones. After captures, the connected group containing the new stone has 2 stones and 5 liberties: H11, H13, G12, I13, J12. 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 · 1 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
J10 - Black
K9 - White
I11 - Black
H12 - White
J9 - Black
J8 - White
I8 - Black
K11 - White
H9 - Black
I10 - White
H11