Launch week20% off Premium — $8/mo, normally $10. Locked in for early players.
Sign inTry it free

Your coach finds why you lose games and what to fix.

An AI chess coach grounded in a real engine — it can’t make chess up.

For example: “You lose most games after castling late — here are the 6 where it happened.”

Try it with your games — no accountCreate account

Connect Chess.com or Lichess — takes about a minute, no card needed. Your coach reads a real game of yours and you talk to it.

  1. 1. Connect your gamesLink Chess.com or Lichess.
  2. 2. Find your repeat mistakesThe coach spots what keeps costing you games.
  3. 3. Practice exactly thoseTrain the positions you actually get wrong.
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Coach

Hover any move — it plays on the board. Click a question to take over.

400
games read in ~60s
100%
of claims engine-verified
0
made-up moves. Structurally.
Stockfish 17
in your browser — no server queue
Everything is measured

One coach, every angle.

It read your games. All of them.

Coach
I’ve been through your games. Positional inaccuracies — 57× across 55 games. Blunders cluster in 15–60s thinks (2.3×). One mistake breeds another at 4.6×.

A real first message — every number measured from your games, none generated.

Your blunder fingerprint.

Blunder rate by think time

<5s
0.7×
5–15s
2.1×
15–60s
2.3×
60s+
0×

When you blunder, what you misjudge, where your prep ends.

Every game reviewed.

Eval — you vs. opponent

Each turning point found and explained in plain language.

Zero hallucinations.

you ask→engine computes→verified→coach speaks ✓

If a claim can’t be verified, it isn’t reworded. It’s removed.

One coach, every question

Ask it anything.

ReviewWhy did I lose this game?
ReviewWas Nxe5 a blunder?
LearnTeach me the London System
LearnWhat should I play against 1.e4?
LearnHow do I win K+Q vs K?
AskIs this position winning?
InsightsWhat's my worst opening?
InsightsWhat mistakes do I repeat?
TrainPlay against me like a 1600
TrainGive me a puzzle from my weaknesses
One minute to start

How it works.

1

Connect

Drop in your Chess.com or Lichess username. No password needed — games are public.

~10 seconds
2

The coach reads

Your games get scanned move by move. Recurring mistakes, habits, openings — measured.

~60 seconds
3

Train what it found

The first message is your personal brief. From there: explanations, puzzles, drills, sparring.

the rest is chess
Why not just…

The honest comparison.

DeeplineChatGPT & AI botsRaw engine
Explains why, in plain words✓✓✗
Every move is engine-verified✓✗✓
Can’t invent moves✓✗ famously✓
Reads your real games✓✗✗
Ranks your weaknesses by what they cost✓✗✗
Remembers the mistakes you repeat✓✗✗
Builds training from your weaknesses✓✗✗
PriceFree to start$20/moFree, good luck
Less than one chess book a month

Simple pricing.

Free

$0 / forever
  • ✓Import & analyze your games
  • ✓Coach chat with monthly credits
  • ✓Daily puzzles on your weaknesses
  • ✓Play The Human & themed bots
Start freeNo credit card. No trial clock.
Most popular

Premium

$10$8 / month
−20% Launch price — locked in while you stay subscribed.
  • ✓200 coach questions a month
  • ✓The full weekly schedule, every day unlocked
  • ✓Narrative insights on your analytics
  • ✓Full tendencies profile & progress tracking
Get PremiumCancel anytime from your profile, one click.
Questions players actually ask

FAQ.

Does it make things up like other AI chess tools?
No — by construction. A real engine (Stockfish 17) computes the analysis first; the coach only narrates what was computed, and every move it mentions is verified before you see it. If a claim can’t be verified, it’s removed. That’s the whole architecture.
Which platforms does it work with?
Chess.com and Lichess — just your username, no password (your games are public). You can also paste any single game link or a position (FEN).
How many games does it need to know me?
The coach is useful immediately with a single game. The personal profile — recurring mistakes, think-time habits, queen-trade record — gets solid around 50+ analyzed games and reads your last 400.
What level is it for?
Built for roughly 800–2200. The coach reads your rating and your games before it answers, so “what should I work on?” has a measured answer — not a guess.
What does free actually include?
Importing and analyzing your games, 50 coach messages a month, daily puzzles, and the bots. Premium ($8/mo, or $70/yr) raises that to 200 coach messages a month.
Are my games kept private?
Yes. We only read your public games using your username, never ask for your password, and your analysis and coach chats are visible only to you.
Can I cancel Premium?
Yes — one click from your profile. It stays active through the end of your billing period, no surprise charges.
About Deepline

Deepline is made by Deepline Intelligence LLC, a registered company in the United States.

The team is two people.

  • Matthew Ma, founder. I am 16, in high school in California, and a tournament player (US Chess rating 1973). I designed Deepline, wrote all of the code, and answer the support email. LinkedIn · US Chess profile.
  • Xiao Ma, owner. My dad. He owns the LLC and handles the business side: finances and contracts. LinkedIn.

There are no other employees or contractors.

The product. Deepline is a chess coaching app. You connect your Chess.com or Lichess account. It analyzes your games with Stockfish 17, finds the mistakes you keep making, and explains them in a chat. It also builds puzzles from positions in your own games. It is free to start. The paid plan is $8 a month or $70 a year.

I started it in 2026 because the chess apps I used marked my mistakes but did not explain them.

MMatthew MaFounder, Deepline Intelligence LLCFull team page →

Your games are the curriculum.

Type your Chess.com or Lichess username. Meet your coach in a minute — no account needed to start.

Try it with your games

free · no account · no credit card