Boudica is an experimental chess engine primarily built by prompting Claude Code. It is named after Boudica, queen of the Iceni. At full strength it plays at roughly ~2100 ELO.

Press New Game to start playing.

Boudica 5:00
0.0
You 5:00
Depth: -
PV: -

Time Control

Formats like 5+3 mean each player starts with 5 minutes on their clock, and 3 seconds are added after each move (increment).

No Limit means there is no clock — take as long as you like.