Ten personalities running on Stockfish 18, each tuned with its own skill level, thinking time, and playing style — not just the same engine at different depths.
Cheerful and forgiving
Just learned the rules last week and is thrilled to play. Frequently misses tactics.
Slow, patient, positional
Never rushes a decision. Plays quiet, solid chess and waits for mistakes.
Fast and aggressive
Moves almost instantly and loves speed chess. Plays sharp, forcing lines.
Speculative sacrificer
Throws material for initiative and haunts kings that castle too late.
Highly defensive
Builds an impenetrable position and grinds opponents down on time and patience.
Balanced instructor
Plays textbook-sound chess and narrates good technique along the way.
Relentlessly aggressive
Fixates on hunting down the enemy queen with tactical pressure.
Endgame specialist
Plays a quiet middlegame, then becomes nearly unbeatable once pieces come off.
Unpredictable
Deliberately weights unconventional moves — hard to prepare for, harder to read.
Silent and precise
Full-strength Stockfish. No mercy, no small talk.