Play Custom Chess Online with Friends

Join room (Black)

Play against Computer

Experience the Next Generation of Chess Variants

Join the Chessperiment community and play unique chess variants online with friends or against our integrated Stockfish AI. Our platform allows you to use custom boards and piece sets designed by creators around the world. Whether you're interested in testing a new piece logic you just created or want to jump into a match with standard rules on an irregular board, our smooth multiplayer experience has you covered. Start a private match by sharing a room code, or join the lobby to find other players. With real-time move validation and advanced engine analysis, Chessperiment offers a robust environment for both casual play and competitive testing of new game mechanics.

→ Create a New Board→ Browse Community Sets→ Your Saved Games

Online Play Guide

Stockfish AI Integration

Challenge yourself by playing against the Stockfish AI. You can test your custom chess variants and see how a top-tier engine evaluates your new pieces.

Inviting Friends

Simply share your room code to start a match. No complex setup required – just send the link and start playing your variant immediately.

Fair Play & Logic

Our real-time engine ensures that all moves follow your custom defined logic. Fair play is maintained through server-side validation of every move.

Join matches across different time zones and enjoy lag-free chess with custom assets.