Know your opponent before the first move.
Prophylax analyzes your opponent's games, builds out a report and builds a custom AI bot that plays exactly like them
88.4%
Move match accuracy
34k+
Bots generated
4.6/5
Player rating
Bot of Hikaru
Elo 3425 · matched from 45,076 games
Practice your next opponent, today
Prophylax analyses thousands of positions from your opponent's game history and trains a prediction engine that replicates their opening repertoire and tactical patterns
Move prediction accuracy
Game history analysis
We pull your opponents' public games from 
Chess.com and 
Lichess to map out recurring openings, blunder patterns, and preferred piece setups.
Validated accuracy
Every bot is benchmarked against held-out games from the same player, reaching a 88.4% average move preditcion accuracy.
Unlimited practice games
Replay the same matchup as many times as you want, adjusting time control and color to rehearse your exact game-day scenario.
Arm yourself with every game's intel
Prophylax gives you the tools to analyze any player, explore openings position by position.
Detailed player report
Get a full breakdown of any player's openings, win rates, and common blunders.
Board explorer
Step through any game move by move with live move prediction, so you can see exactly what your opponent does.
Custom puzzles
Turn errors from opponents' games into a personalized puzzle set, so you drill the exact patterns to crush them.
What Prophylax users are saying
"I played the bot version of my club rival three times before our tournament match. Beat him for the first time ever. The style match was really accurate."
"The opponent analysis dashboard alone is worth it. Seeing their opening repertoire laid out saved me hours of manual review before every game."
"Bots feel genuinely human, not just weaker Stockfish."
Start preparing smarter, not longer
Create your free account and generate your first opponent bot in under two minutes.