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2 Players
Pure head-to-head strategy
Arcadeum
Online Gaming Arena
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Online Gaming Arena
The ancient game of surrounding territory. Simple rules, infinite depth.
Place stones, surround territory and capture groups on the most elegant strategy board ever made.
Live previewAdventure
Pure head-to-head strategy
Learn on 9×9, improve on 13×13, master 19×19
Surround groups to remove them — the ko rule keeps it fair
Four difficulty tiers, from friendly randoms to MCTS search
Learn the fundamentals of territory, captures and scoring.
Pick a board size and theme, then share the link with a friend.
Or fill an empty seat with an AI bot at any difficulty.
Every shared Arcadeum theme is available — the board adapts to your vibe.
Epic quests and exploration
Control more territory than your opponent by surrounding empty points and capturing enemy groups.
A group with no remaining adjacent empty points (liberties) is captured and removed from the board.
Immediately recapturing a single stone that would recreate the previous position is forbidden — play elsewhere first.
Two consecutive passes end the game. Pass when no valuable move remains.
Challenge intelligent bots or play against friends in real-time matches.
Place stones, surround territory, capture groups — two passes end the game and area scoring decides the winner.
Neon-lit dystopian future
Deep ocean depths
Noir detective underworld
Dark and terrifying atmosphere
Mountain summit expedition
Deep space exploration
Magical realms and mythical creatures
Wild West frontier
Ancient Egyptian mysteries
Victorian-era mechanical wonders
Peaceful Japanese aesthetics
Chinese area scoring: stones + surrounded territory, white starts with 7.5 komi points.
Classic 8×8 checkers with forced captures, multi-jump, and king promotion