Play Three-check.
Play solo against the computer, with friends online, or on one device.
1 player vs computer or 2 players · Free to play · No account needed
Choose how to play.
Fairy-Stockfish runs on your device. First use loads about 1.1 MiB.
Your level is remembered on this device. Solo games are unrated.
Online play needs a connection. Invitation rooms are private and expire seven days after the last move. Local play works on one device without connecting to the room service.
How to play Three-check
Standard chess rules, plus a second way to win: give your opponent check three times. A double check counts as one checking move. Checkmate also wins. Each player’s checks are shown beside the board. Standard castling, en passant and all four promotions apply. Stalemate, insufficient material, threefold repetition or fifty moves without a pawn move or capture draws.
Rules credits and corresponding source · Computer engine credits and source
Before you play
How many people can play Three-check?
Play solo against the computer, or with 2 players. Choose your mode above before starting.
How do I invite friends?
Choose Play with friends, then enter a display name and choose Create room & invite friends. Copy the invite link and send it to your friends. They enter their own names to join; no account or download is needed. Only people with the link or room code can join.
Can we play on one device?
Yes. Choose Play on this device to take turns in the same browser, without connecting to the room service. JavaScript is needed for both local and online play.
Can I play against the computer?
Yes. Choose Play solo, pick Easy, Normal or Hard, then Start solo game. You can change the level during a game. No account or room connection is needed.
Is Three-check free to play?
Yes. Local tables and private online rooms are free to play. Online play needs an internet connection; rooms expire seven days after the last move.