Diagonal Board

Outsmart the AI, challenge a friend across the table, or duel online in private rooms. One simple rule, endless strategy. Your next favorite board game is here.

Diagonal - Strategic Board Game A board game so simple you'll learn it in 30 seconds. So deep you'll be replaying matches in your head for hours. Connect, block, and outmaneuver. Every move matters. Every game is different. THREE WAYS TO PLAY Single Player - Sharpen your strategy against an AI that adapts to your level. Start easy, climb to expert. The AI doesn't go easy on you forever. Play in Person - Pass the phone, settle the score. The fastest way to find out who really has the better mind at the dinner table, on a flight, or waiting for coffee. Play with Friends - Create a private online room, share the code, and challenge anyone, anywhere. No accounts, no clutter, no waiting. WHY PLAYERS LOVE DIAGONAL

Easy to learn: one core rule, no tutorial overload Hard to master: every position has a perfect move, if you can find it Fast matches: most games end in under 3 minutes Beautifully minimal: clean design, no clutter, no ads in your face Plays offline: single player and pass-and-play work anywhere Quick rematches: one tap and you're playing again

DESIGNED FOR REAL LIFE Diagonal fits the gaps in your day. Waiting for the bus. In line for coffee. Stuck on hold. The kind of game you open for one match and look up 20 minutes later wondering where the time went. No grinding. No energy timers. No pay-to-win. Just you, the board, and the next move. PERFECT FOR

Strategy game fans who like chess but want something faster Couples and roommates who need a tiebreaker Long-distance friends who want a low-effort way to stay in touch Anyone who's bored of slot-machine mobile games Commuters, travelers, and coffee shop philosophers

Download Diagonal free and play your first match in under a minute. Then try not to play "just one more." Your move.