Launch week20% off Premium — $8/mo, normally $10. Locked in for early players.
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Know why you lose.

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

Start freeTry any game →
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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.
1100–1900
human play, modeled per rating
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.

Human context.

6% of 1400s find Nxf7
24% find the right Na5
— on every single move

Not just engine-best — what people at your level actually find.

Spar The Human.

The Human (1400)
real openings · real plans
real occasional slips

A bot that plays like your next opponent, not like a computer.

Puzzles that fit.

fork · rated 1340
9% of your level solve it

Aimed at your recurring mistakes, graded by real human solve-rates.

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
Join 100+ players sharpening their game

Early players, real gains.

★★★★★

“First app that told me WHY my rook was bad instead of just slapping a ?? on it. Up 80 points in three weeks.”

Jordan M.1450 rapid
★★★★★

“The Human bot is unfair — it plays exactly like the 1600s I keep choking against. Finally practicing the real thing.”

Priya K.1580 blitz
★★★★★

“Asked why I keep losing with the Caro and it just… knew. Pulled up my actual games. Kinda spooky honestly.”

Devin R.1320 rapid
★★★★★

“I don’t trust AI for chess. This one literally cannot make moves up — that’s the whole point. Sold.”

Marcus T.1710 rapid
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✓✗✗
Knows what your level actually plays✓✗✗
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.
  • ✓Every game deep-scanned with high-depth Stockfish
  • ✓200 coach questions a month
  • ✓Unlimited puzzles, drills & sparring
  • ✓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 human-play model covers 1100–1900 in detail, so “what do people at my level do?” has a real answer — not a guess.
What does free actually include?
Importing and analyzing your games, coach chat with monthly credits, daily puzzles, and the bots. Premium ($8/mo, or $70/yr) raises the limits to 200 coach questions a month and deep-scans every game you’ve imported.
Can I cancel Premium?
Yes — one click from your profile. It stays active through the end of your billing period, no surprise charges.
From the founder

Hey — I’m Matt. I’m 16 and still in high school, and I built Deepline because I was sick of chess apps telling me what I did wrong but never why. A “??” with no explanation doesn’t teach you anything.

So I made the coach I actually wanted: one that reads all my games, remembers the mistakes I repeat, and explains them in plain words — grounded in a real engine so it can’t bluff. It’s just me building this, and every piece of feedback comes straight to me.

MMatt16 · founder & solo builder

Your games are the curriculum.

Connect Chess.com or Lichess. Meet your coach in a minute.

Start free

free to start · no credit card