4000 ELO Chess Bot: Play Nox Free
Looking for a 4000 ELO chess bot? Here is the honest answer: no bot plays at 4000 ELO against humans, on ChessRank or anywhere else. No human player in history has reached 2900, so 4000 would sit more than 1,100 points above the best player who ever lived.
Chess engines like Stockfish do get ratings above 3500, but those come from computer rating lists where engines only play other engines. They compare engines with each other and do not translate into a human ELO, so a bot labelled 4000 is a number, not a strength anyone could measure.
What you can play right here, for free, is the top of our ladder: Nox, rated 3000, which plays the strongest move it finds in its thinking time. Pick Nox above, or any of the twelve bots from 0 to 3000 ELO, with no login and no ads.
What to play instead
Nox, 3000 ELO
The strongest bot on ChessRank. It is not held back like the rest of the ladder and it is the hardest opponent we have. Even a draw is an achievement.
Regent, 2000 ELO
The strongest bot that still plays at a human level. A real test for strong club players, and the last rung before Nox.
A bot at your level
Close games against a bot near your own rating teach you the most. Start near your rating and climb the ladder as you win.
Frequently asked questions
Is there a 4000 ELO chess bot?
Not in any meaningful sense. No human has ever reached 2900, and engine ratings come from engine only rating lists that do not translate into a human ELO. On ChessRank the strongest bot is Nox at 3000.
What is the highest ELO chess bot on ChessRank?
Nox, rated 3000. It plays the strongest move it can find in its thinking time, backed by an opening book searched in advance.
What is the highest rating a human has reached?
2882. Magnus Carlsen reached it on the FIDE classical list in 2014, and it is still the highest rating in history.
Are the bots free to play?
Yes. All twelve bots are free, with no ads, no login and no daily limit, and every game ends with a full Stockfish game review.