Read the position, not just the notation.
On supported games, move-linked commentary and available translations sit beside the exact move they explain.
- Board annotations
- Original commentary and available translations
- Variants beside the score

Play online · 500,000+ game library
Meet a rated opponent, share a Casual table with a friend, or begin with masters, manuals, puzzles, tournaments, and openings. Both paths lead to positions you can review and explore.
Rated is for signed-in members. Casual welcomes guests and provides a room link to share.
Open Play

Live play
Choose Rated against another signed-in player, open a Casual table for a friend, practice against the computer, or check the lobby.
Find another signed-in player and make the result count.
Open a table and share its room link. Both seats can join without an account.
Choose a named computer opponent and play at your own pace.
Join an open seat or watch a live game already in progress.
Inside the library
Search the full catalog, or begin with a player, a preserved manual, a puzzle collection, a tournament, or an opening family.

Recorded games in the searchable library
Online table types: competitive Rated and guest-friendly Casual
Connected study tools: Game Workspace, Canvas, and CBL Browser
Canvas workspace
A move list is linear. Your thinking is not. Canvas keeps the main game, side lines, and open questions together on one navigable surface.

Keep the context
Score, available comments, opening, candidate moves, and the larger game tree stay close without breaking your train of thought.
On supported games, move-linked commentary and available translations sit beside the exact move they explain.


Open a local CBL file or a library record, inspect the position, then move directly into study, analysis, or the branch canvas.
Move without the menu
Press Ctrl K or ⌘ K to jump directly to Play, Library, a real game, Canvas, or CBL Browser.
Play one or open one.