Omnichess

Omnichess lets you design and play your own chess variants, against AI or online with other players. Games support 2–8 players, either all against each other or in teams.

Boards and rules

Choose square, hexagonal or triangular tiled boards, then customize how pieces and games work. You can define how a chess piece moves, choose from over 40 piece icons and alter rules, such as enabling en passant for bishops or allowing castling between any pair of pieces.

Game options

• Win conditions: Checkmate, play for points, tile capture or Annihilation.
• Timers: Interval, Bronstein or Hour Glass.
• Asymmetric move timers: give yourself extra time per move against a more experienced player to even the odds.