Pick your challenger
Five Stockfish engines — from a friendly sparring partner to no-mercy full strength — all running right in your browser.
Difficulty
Play as
Variant
Types by time control
How much time each player has on the clock.
- Classical90 min+
Players get 90 minutes or more. This allows deep, careful thought.
- Rapid10–60 min
Games last between 10 and 60 minutes per player.
- Blitz≤ 10 min
Each player has 10 minutes or less. Moves must be fast.
- Bullet< 3 min
Players get less than 3 minutes total. This format requires lightning-fast reactions.