Every recommendation explains why
See why this activity made the plan, why it matters now, and how strong the supporting evidence is.
Personal chess training, properly directed
Stop guessing what to train.
Mainline turns your games, goals, and available time into a daily chess training program that keeps adapting.
It sits above puzzle trainers, game analysis, books, and courses. Instead of giving you more material, it decides what deserves your attention today, then tells you why.
Open beta · free to use
Illustrative training line
A plan from your reality
Time available25 minutesRecent signalmissed conversionsGoalstronger OTB playDue practice2 reviews
110 min
Repair your own mistakes
Recent games supply the positions.
28 min
Review what is due
Completed work returns when it is useful.
37 min
Build the current priority
The session fits the goal and time left.
Every block carries its evidence grade, the data that triggered it, and an honest explanation of uncertainty.
Your first session
Five steps from scattered data to a useful day.
Setup gives Mainline enough context to make a defensible first plan. You can change every constraint later.
- 1Connect
Bring your games
Link Lichess or add Chess.com so Mainline can work from your actual play.
- 2Calibrate
Establish a baseline
Complete a short tactical check. We measure play instead of asking you to rate yourself.
- 3Constrain
Define your reality
Set your available time, goals, formats, preferences, and resources you already own.
- 4Reveal
See the starting picture
Review the useful signals, the uncertainty, and what the program can act on first.
- 5Train
Open today’s session
Get a practical plan that fits today, with a reason attached to every activity.
After setup, the loop is simple: train, play, and let new outcomes change what deserves attention next.
The no-BS part
Trust should be visible in the product.
Mainline is science-based without pretending the science is stronger than it is. Its boundaries are part of the product, not fine print.
No rating promises
No training activity has been proven to cause rating gains. Mainline will not turn uncertainty into a sales pitch.
The plan keeps moving
New games and completed training reshape what comes next. There is no generic syllabus to fall behind on.
Your data stays under your control
Connections are read-only. Your data is never sold, and you can export or delete it whenever you choose.
No runtime AI
The product uses open data, transparent rules, and a client-side chess engine, not an opaque chatbot deciding your training.
Training quality is never paywalled
Mainline is free, without ads. Optional patronage may support the project, but never buys better training.
Step 1 · create your account
Give your chess training a main line.
Mainline is currently in open beta. Sign in, and we will take you straight to connecting your games.