Play Chess Against a 2800 Elo Computer
Bjorn is a 2800 Elo computer opponent from Norway — grandmaster strength with a bone-dry, universal style. He is at home in every kind of position and specializes in grinding tiny advantages in the endgame until they crack. Just below full engine strength, he leaves almost nothing to exploit. Free, no account, in your browser, with a full review when it's over.
What a ~2800-rated opponent plays like
Bjorn has no stylistic hole to aim at: he plays sharp positions accurately and quiet ones patiently, and he is happy to trade into an endgame a fraction of a pawn better and win it by pure technique. At this strength tactics almost never work against him — he sees them coming — so the only chances come from positions he evaluates as genuinely equal.
The honest picture is that Bjorn out-techniques nearly everyone. He doesn't beat himself, doesn't drift, and converts the smallest edge. Give him a target — a weak pawn, an exposed king, a bad bishop — and he will press it for fifty moves without letting go.
Who should play Bjorn
Bjorn is for masters and very strong players who want a grandmaster-level test without facing the full 3200 engine. Against him the realistic goals are holding equality and reaching a fortress or a drawn endgame. To do that, keep the position free of weaknesses, trade into structures you know are holdable, and avoid the slow squeezes he lives for — then use the free review to find the exact move his edge became real.
After the game: a free review
Every game against Bjorn ends with a one-click free game review— accuracy, move classifications from Brilliant to Blunder, and the moment the game turned. That's how you actually improve from playing bots: see the mistake, then drill the fix.
Frequently asked questions
How strong is a 2800 bot compared to Max (3200)?
Bjorn is grandmaster strength and will beat almost any human, but he's a clear step below Max's full engine strength — he's the hardest 'human-like' rung before the unbeatable one. Against Max a draw is the ceiling; against Bjorn a well-played draw is a real, achievable goal.
Why is a 2800 bot so hard to beat?
Because at 2800 the moves are near-perfect: he doesn't hang anything, defends accurately, and grinds tiny endgame edges with flawless technique. Wins essentially require him to already be worse, which his solid style avoids.
Is it free, and does it run on a server?
Free, no account, and it runs entirely in your browser on Stockfish — nothing is uploaded, and there's no limit on games.
Too tough? Try Nadia (2500). Too easy? Move up to Max (3200). Or see all chess bots.