Learn baduk by solving positions · endless, difficulty-graded
Black to playCaptures — ⚫0 ⚪0
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Rules in 20 seconds & library info
Liberties = empty points touching a stone/group. Fill the last one to capture.
Make a group uncapturable with two eyes (two separate interior points).
Difficulty 1→5 = Beginner→Expert. Each solved puzzle is remembered and never repeats.
Known problems are served first; the AI only invents new ones once the known pool at a level is exhausted. Expert opens with classical problems from public-domain collections (Gokyo Shumyo, Xuanxuan Qijing, Guanzi Pu and others), each solved and checked with KataGo.
Sandbox
Free play
Two-player local board. Captures, suicide and ko are enforced — try ideas from the puzzles.