Bridge the gap between amateur play and Grandmaster-level preparation with a professional-grade training ecosystem.
extrapawn.com is a closed-loop interactive platform designed for tournament players (1500+) who seek a disciplined training environment. We combine deep engine-backed analysis with realistic, human-like AI sparring to transform chess study into a repeatable, high-impact skill.
Most chess platforms focus on casual play or disconnected puzzles. extrapawn.com is different. We provide a closed-loop training cycle:
- Build your weapon in the STUDY laboratory.
- Test it in sparring against rating-specific human-like AI.
- Hone the realization of gained advantages.
- Analyze weaknesses in your interactive dashboard.
- Fix and repeat until mastery.
Your interactive command center for repertoire building.
- Speedrun & Reply Training: Move beyond passive reading with active recall and memory-stress training.
- MozerBook Integration: Leverage elite statistics and engine-verified trees to build bulletproof preparation.
- Lichess Sync: Two-way synchronization with your Lichess studies.
Test your preparation in a realistic tournament environment.
- Dynamic Opponents: Bots move based on live player statistics (Lichess 1000–2200+) with adjustable variability.
- Personality Types: Choose between Master (theoretical), Hustler (statistical), or Swindler (poisonous traps).
- Playout Transition: Seamlessly transition from the opening to advantage realization against Maia AI.
Learn to punish typical mistakes and secure "Brilliant" achievements.
- Hunt & Secure: Find the "Diamond" move (
!!), refute the bot's blunder, and replay the entire line from memory to lock in the knowledge. - Gravity Map Guidance: Visualize tactical tension with real-time arrow-based mapping.
| Module | Focus | Engine & Intelligence |
|---|---|---|
| 🌪️ Tornado | Tactical Storm | Adaptive Glicko-2 trainer with 15 thematic vectors. |
| ⚔️ Finish Him | Art of Realization | Master the skill of coldly finishing off won positions vs Maia. |
| ♟️ Practical | Real-game Scenarios | Converting extra pawns and positional intuition training. |
| 📖 Theoretical | Book Master | Master classic endgame positions against provocative engines. |
| 📊 User Cabinet | Command Center | Rose Charts visualizing your technical DNA and progress. |
Our infrastructure utilizes a distributed engine cluster to provide specialized computations for every training scenario.
| Engine | Role | Playstyle |
|---|---|---|
| Stockfish 18 | Absolute Truth | Mathematically perfect, optimal for strict "best" moves. |
| Maia (1900-2400) | Human Sparring | Predicts moves that feel human, including realistic error patterns. |
| LCZero | AI Intuition | Deep neural network analysis for strategic and positional evaluation. |
| MozerBook | Theoretical Hub | Curated database of opening theory and statistical winrates. |
We operate on an "Active-First" model that rewards community engagement.
- PawnCoins: Power your high-intensity playouts and advanced repertoire generation.
- Bonus Program: Earn automatic tier upgrades (Knight, Bishop, King) by being an active member of the ExtraPawn club on Lichess.
- Verification: Achievements and progress are verified and linked directly to your Lichess profile.
- Frontend: Vue.js 3.5+ (Composition API), TypeScript (Strict), Vite, Pinia, Naive UI.
- Backend: NestJS (Node.js) & FastAPI (Python) distributed architecture.
- Persistence: Supabase (Postgres), IndexedDB (Dexie), LMDB.
- Core Logic: Chessground and Chessops.
- Automation: n8n.io workflow orchestration.
Moser — Mechanical engineer and lifelong chess student. ExtraPawn represents the dream of a professional tool that empowers players to study effectively through AI and automation.
Special thanks to the Lichess.org team, the Stockfish project, LCZero, and Maia Chess.
License: GNU General Public License v3.0 | Built for those who seek chess mastery.