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- Validate PGN files instantly
- Check formatting and basic issues
- Perfect for quick one-off use
How FelixChess Fits
FelixChess doesn't replace where you play. It's the preparation layer serious players add when they're ready to go deeper.Β
Where you play
Where you prepare
Play on chess.com or Lichess. Prepare with FelixChess. Improve everywhere.
Feature Showcase
Serious Chess Tools for
Serious Improvement
FelixChess combines a massive game database, flexible move-tree exploration, deep position search, and modern engine analysis in one focused platform.
Dynamic Move Tree
Select an opening, player, event, or even a Chess960 SPID and explore every branching line drawn from millions of real games. The Move Navigator lets you drill into any node - no page reloads, no dead ends.
Opening Explorer
Four ways to reach the position you're looking for: ECO code, opening name, move sequence, or paste a full PGN. Results draw from 30 million indexed games and every registered FIDE player.
Game Analyzer
Analyze any position with Stockfish 18 built right in. Review multiple candidate lines, evaluate critical moments, and study the way serious players do - with tools designed for practical improvement, not just entertainment.
Player
Search any FIDE-registered player - free, no account required. See rating history across Classical, Rapid, and Blitz, career results, and recent games instantly. Create a free account to unlock full match history, opening repertoire, and head-to-head comparisons.
Use Cases
FelixChess helps players prepare for tournaments, study openings, research opponents, and learn from every game with modern tools and real data. Β
From understanding to ownership
Understanding an opening is the first step - playing it under pressure is the real test. Start in the Opening Explorer to learn the ideas, then dig into the Move Tree to build a repertoire you can play.Β
For Tournament Players
Before the pairings go up, you know your field, not your opponent. Filter by rating band and game volume to see what players at your level are actually choosing - then narrow variation depth to focus on the lines that matter most.
For targeted Prep
Once pairings are out, you know exactly who's across the board. Research them specifically - their tendencies, their favorite structures, the positions they walk into again and again.Β
For continuous improvement
Losing usually comes down to a weak opening, a missed tactic, or preparation that didn't hold up. Check Opening Explorer or Move Tree to see where you left known theory - or import your games from chess.com or Lichess and let Training Report surface the tactical patterns a quick review would miss.
Free to start. No credit card. Cancel any time.
ACCESS PLANS
Use core tools instantly, create a free account for opening research, or unlock the full platform for serious preparation and analysis.
No account required
Create an account to go further
For serious players and preparation