Playable 9x9 Go Board

Black to move Open with Black. Two consecutive passes end the game.

Black captures

White captures

Black estimate

White estimate

Move log

No playing on occupied intersections.
Captures remove groups with zero liberties.
Self-capture is blocked unless the move captures first.
Simple ko: you cannot recreate the previous full-board state.
Score estimate is rough territory plus captures. No komi because this is a toy, not a tournament director.