Mainline Closed Beta: Open-source, science-based chess training

ALERT: If you hate AI-assisted code, turn back now! However, if you like 600+ automated tests, open-source code, and zero runtime AI slop, keep reading.

Mainline is an open-source no-bs science-based chess training app. It creates a personalized daily training session for players who actually want to improve.

Chess players generally waste time on random puzzles, videos, and rigid study plans. Course sellers promise fast rating gains without any scientific evidence. Worst of all, these generic plans ignore your real games, your actual blunders, and your daily time budget.

Mainline: -> connects to Lichess and/or Chess.com -> looks at your games and your available time -> builds in-app puzzles, blunder practice, and endgame drills -> daily plan adapts as you train

Mainline is honest. Every recommendation includes an evidence grade and a "why this / why now" note. Free forever, no ads, no paywalls, no runtime AI. All for maximum bullshit avoidance and transparency.

I'm looking for 5-10 serious beta testers to train with Mainline for ~two weeks.

Tester requirements: - All ratings welcome, but preferably 800-1800 Chess.com and/or 1200-2000 Lichess - Available to train at least 3 times per week for 2 weeks - Willing to share some feedback in DM or in-app

Contact me on Github if you're interested!