Unlock Demon
Challenge Demon (3190 ELO) and train against elite and legendary AI opponents to sharpen your game.
$19.99From $9.99/mo
Try ProAlready a member? Sign in← All computer levelsPractise against Demon
Demon runs Stockfish 19 with its own strength limit set to 3190 (UCI_Elo), at search depth 16. This is the top of Stockfish's rated strength range, beyond any human player. Use it to test your defence in positions you know well.
After each game, set up the position where it turned in the best move calculator and see what Stockfish would have played. Pro members can also run the whole game through the chess analysis board for a move-by-move review. If Demon feels too easy, move up to Salazar (3650); if it is too strong, drop to Magnus (2900).
All 11 levels are on the play chess against the computer page, and the bots up to 2600 are free. How each one is tuned is explained in our guide to chess bots.