Every recommendation shows evidence
Every training block displays its evidence grade, research citations, and scheduling reason.
Evidence-based chess training
Stop guessing what to train.
Mainline converts your games, goals, and daily time into an adaptive training program grounded in learning science.
Instead of giving you endless random puzzles, Mainline targets your measured mistakes and schedules spaced reviews.
Open beta · no sign-in required
Example daily session
Structured daily training
Time budget25 minutesPrimary weaknesstactical conversionsFormat goalrapid chessDue reviews2 blocks
110 min
Blunder drills from your games
Positions extracted directly from your recent losses.
28 min
Spaced repetition reviews
Scheduled based on past mistake review intervals.
37 min
Endgame conversion drills
Practical endgame structures matched to your rating.
Every block includes an evidence grade, data source, and clear explanation of uncertainty.
Interactive blunder analyzer
Find the tactical blindspots in your games.
Enter your public chess username. Stockfish scans your games locally to identify recurring mistake patterns.
Onboarding flow
Five steps to your tailored daily session.
Setup configures your constraints and analyzes your game baseline. You can adjust settings at any time.
- 1Constrain
Set your constraints
Set your daily time budget, format preferences, goals, and owned books.
- 2Connect
Connect your accounts
Link Lichess or Chess.com to import your public games and tactical mistakes.
- 3Calibrate
Measure your baseline
Solve a short 3-puzzle check to estimate tactical rating and blunder patterns.
- 4Reveal
See your starting profile
Review your tactical rating, game signals, and initial training priorities.
- 5Train
Start your daily session
Train with personalized blocks that adapt as you complete exercises and play games.
After setup, the daily loop is simple: train your blocks, play your games, and let new outcomes adapt your next session.
Methodology
Scientific honesty in every recommendation.
Mainline uses peer-reviewed cognitive science without claiming false guarantees. All methodology rationales are public and open.
No rating promises
No study proves that specific chess training causes rating gains. Mainline uses best evidence without false certainty.
Adapts to your play
New games, mistake drills, and completed reviews reshape what Mainline schedules next.
Your data stays private
Connections are read-only. We do not sell your data, and you can export or delete your account at any time.
No runtime AI
Mainline uses deterministic algorithms and a client-side Stockfish engine, never generative chatbots.
Core training is never paywalled
Mainline is free and ad-free. Optional supporter tiers fund hosting without locking training features.
Get started
Build your personal training plan.
Mainline is in open beta. Sign in to connect your games or try a local guest session.