This is an opening tree of all ideal openings on the 9x9 board. “Ideal” means that perfect play from that point should lead to a draw under Chinese rules and 7.0 komi. If a move does not appear in this opening tree, then it can lead to a loss if the opponent responds accurately.

All lines are complete to move 4. Some lines have indications for move 5. Some lines also have commentary.

Please submit any corrections to mark5000. Move additions or deletions should be supported by AI analysis.