Chess
Chess against Sunghyun or AI, with an AI advisor, or with a friend on two phones
How to play
Choose an opponent
Play the engine with no sign-in. With a free account, face AI, keep AI as an advisor, or invite a friend
Make your moves
Tap a piece to see its moves, then tap a square. Pawns on the last rank promote to your pick. In solo games, ⌘Z or Ctrl Z takes back a move
How games end
Checkmate wins; resigning loses. Stalemate, threefold repetition, the fifty-move rule, and insufficient material are draws
Playing a friend
Share the link or QR code; the game starts when your friend sits. Rematches swap colors