Play free now
Play backgammon free.
Cosmo gives you a complete game with no account or setup. When you are ready for a harder table, challenge Alpha and turn each eligible Standard game into review and training.
Test your judgment
Take the Alpha Challenge.
Commit to ten difficult plays on complete boards, then see every line Alpha ranks first. No account is required to finish and receive a score.
Alpha Review
See the decision that changed the game.
Replay each turning point beside Alpha's ranked moves. Dice luck is calculated separately, and only when you ask.
Personal training
Turn review into focused practice.
Costly moves return as complete positions. Choose a move, compare Alpha's ranked alternatives, and revisit each pattern until the better move becomes familiar.
Free means playableCosmo and the graphite board work without an account.
Fair diceRead the dice and luck policy.
Private by designSee what Standard and Tutor store.
Clear trial30 days, no card, no automatic charge.