ChessAtlas review: scores and evidence
Builds an opening repertoire (tree editor, PGN import, course library), drills it with FSRS spaced repetition and detects where imported Lichess/Chess.com games left the preparation. No documented engine analysis of games, no tactics, no endgames, no online play (DarkSquares and ChessEndings are separate products).
Read on August 30, 2026 from the service’s public pages — every score cites the page read.
Overall score
4.7/ 10
Rank
6/ 128
Languages
2
Listed price
$83.88/yr (annual price shown on chessatlas.net/pricing, $6.99/mo ×12; App Store $83.99) ≈ €77 ($1 ≈ €0.92)
What the service is
ChessAtlas is an opening repertoire trainer published by ANKT SERVICES, a French SAS registered in Angers (SIREN 843902156, privacy policy updated 20 March 2026) and founded by Antoine Tamano, who describes himself as "a club-level player, not a master". The launch date is not published: the earliest dated markers are that March 2026 policy, an editorial policy dated 24 April 2026, blog posts from June 2026 onwards and an iOS app released on 8 June 2026; the pricing page still shows a "Beta Launch" discount. The service lets you build a repertoire (tree editor, PGN import, free course library), review it with spaced repetition using the FSRS algorithm, import your Lichess and Chess.com games to find the exact move where you left your preparation (Deviation Finder), and track opponents' novelties and gaps in your repertoire, with win-rate statistics by opening. The free plan is presented as "a complete trainer, not a demo" (200 variations, 2 linked accounts); Premium costs $6.99 a month or $83.88 a year and can be cancelled online. ChessAtlas does no documented engine analysis of games, no tactics, no endgames and no online play (DarkSquares and ChessEndings are separate products from the same publisher). Interface in English and French; hosted on DigitalOcean in Amsterdam, with no advertising tracker.
Activity history
- 2026-08Version 1.1.0 of the iOS app "Chess Openings - ChessAtlas" on 11 August 2026: improved review scheduler and retry of failed puzzles.
- 2026-07On 15 July 2026, iOS version 1.0.1 adds Lichess study import and offline training; on 10 July, the blog publishes a video walkthrough on editing a course.
- 2026-06On 1 June 2026, a post introduces automatic Lichess/Chess.com game import and the Deviation Finder; on 8 June, iOS app 1.0 is released on the App Store (seller Antoine Tamano / AnKT Services).
- 2026-04Editorial policy dated 24 April 2026: chess.js validation of every move sequence at build time, sourced statistics, verified corrections shipped within 48 hours.
- 2026-03Privacy policy updated 20 March 2026: ANKT SERVICES SAS (Angers), hosting on DigitalOcean in Amsterdam, consent-based PostHog, Sentry, no advertising tracker. It is the oldest dated document found.
The scores, evidence by evidence
Every score points to the page read and the fact found there. A fact documented nowhere is not credited: document it, then write to us.
APersonalized diagnosis
3.3A1 :3Importing your games (Chess.com, Lichess, PGN files)
https://chessatlas.net/features/game-import: Lichess (API) + https://Chess.com; /features/repertoire-builder: game import from PGN files
A2 :1Automatic engine analysis of every game
https://chessatlas.net/features/opening-trainer: optional evaluation bar during training; no engine analysis of games documented
A3 :1Recurring mistakes identified across all your games
https://chessatlas.net/features/game-import: "win rates by opening"; no mistake named or counted
A4 :1Types of mistakes covered (tactics, strategy, endgame, time…)
https://chessatlas.net/features/deviation-finder: single axis = repertoire deviation (opening)
A5 :0Written explanation of each mistake
https://chessatlas.net/features/deviation-finder: deviating move highlighted on the board, no explanatory text
A6 :0Stated verification of the diagnoses (procedure, rates)
No mention of diagnosis reliability on https://chessatlas.net/features/game-import
A7 :2Tracking each weakness over time
https://chessatlas.net/features/game-import: dashboard, performance trends by opening over time
A8 :0Comparison with players of the same rating
No comparison to a rating band on https://chessatlas.net/features/game-import
BOpenings
7.2B1 :3Building a personal repertoire
https://chessatlas.net/features/repertoire-builder: PGN import, visual tree, suggestions from master games and one’s own imported games
B2 :2Training the repertoire (drills, games)
https://chessatlas.net/features/opening-trainer: interactive drill + FSRS; no full game against an opponent playing the repertoire
B3 :3Spotting where you left your repertoire in your games
https://chessatlas.net/features/deviation-finder: deviations detected automatically then added to the review queue
B4 :2Verification of the lines taught (engine, practice)
https://chessatlas.net/features/repertoire-builder: suggestions from "master games and engine analysis"; https://chessatlas.net/editorial-policy; no threshold published
B5 :1Opening explorer and statistics
https://chessatlas.net/features/game-import: statistics on one’s own games; no external database explorer shown
B6 :2Explanation of opening plans and ideas
https://apps.apple.com/app/id6770867404: "Read mode explaining strategic ideas"; https://chessatlas.net/blog written opening guides
CTargeted training
2.6C1 :2Exercises drawn from your own games
https://chessatlas.net/features/deviation-finder: deviations added to the training queue, reviewed in series
C2 :0Bank of tactical exercises (size, themes, rating)
No tactics bank on https://chessatlas.net or https://chessatlas.net/pricing
C3 :0Endgame training
No endgame module on https://chessatlas.net (ChessEndings is a separate site)
C4 :0Strategic and positional training
https://chessatlas.net: six feature pages, all about openings; no positional exercise
C5 :0Training defense and alertness
https://chessatlas.net: no mention of a defensive exercise
C6 :0Training calculation and visualization
No calculation exercise on https://chessatlas.net (DarkSquares is a separate product, https://darksquares.net)
C7 :0Difficulty matched to your real level
https://chessatlas.net/features/spaced-repetition: FSRS intervals; no adaptive difficulty rating of exercises
C8 :3Spaced repetition (named algorithm)
https://chessatlas.net/features/spaced-repetition: "FSRS (Free Spaced Repetition Scheduler)" named; https://chessatlas.net/features/opening-trainer: "reviewing due cards" mode
C9 :2Personalized training plan
https://chessatlas.net/features/opening-trainer: queue of due cards + "weak spots", the same for everyone; no adjustable time budget
DPrice and value
6.7D1 :2What the free plan actually lets you do
https://chessatlas.net/pricing: free "forever", 200 variations, 2 linked accounts, "a complete trainer, not a demo"
D2 :1Annual price of the full plan
https://chessatlas.net/pricing: $83.88/year ≈ €77 → €76-150 band
D3 :2Commercial transparency (price shown, trial, cancellation)
https://chessatlas.net/pricing + /cgv: price displayed, trial, cancel button; automatic renewal
D4 :3Number of paid tiers (how simple the offer is)
https://chessatlas.net/pricing: Free $0 and a single Premium tier ($6.99/month or $83.88/year), no one-off purchase
EEvidence and transparency
6.7E1 :1Published evidence of effectiveness
https://chessatlas.net/features/spaced-repetition: "200% better retention" (general study, Karpicke 2008), no product data
E2 :2Chess verification of the content (positions, lines)
https://chessatlas.net/editorial-policy: chess.js validation, cross-checking against databases, correction within 48 h; no threshold
E3 :2Transparency of the method (algorithms, code)
https://chessatlas.net/about + /features/spaced-repetition: FSRS named; https://github.com/chessatlas with no public repository
E4 :3Marketing claims that can be checked (no overselling)
https://chessatlas.net/about: factual wording, limits stated (untitled founder, uneven content across languages)
FContent and method
4.7F1 :1Courses organized by rating level
https://chessatlas.net: opening course library; no level labelling found
F2 :1Course authors named and titled
https://chessatlas.net/about: founder Antoine, "club-level player", untitled
F3 :2Content formats (text, video, interactive)
https://chessatlas.net/blog (text) + interactive trainer; video limited to a tutorial dated 10/07/2026
F4 :0Published method of progression
No progression method on https://chessatlas.net/about
F5 :3How often the content is updated
https://chessatlas.net/blog: posts in May, June, July 2026; App Store version 1.1.0 dated 11/08/2026
GPlaying and practice
0.0G1 :0Playing humans online (pool, anti-cheating)
No online play on https://chessatlas.net
G2 :0Realistic artificial opponents
No artificial opponent on https://chessatlas.net/features/opening-trainer
G3 :0Replaying one specific position against the machine
No practice from a position on https://chessatlas.net
G4 :0Tournaments and organized competition
No tournament on https://chessatlas.net
HExperience and accessibility
4.0H1 :3Platforms available (web, iOS, Android, desktop)
https://chessatlas.net: https://app.chessatlas.net + https://apps.apple.com/app/id6770867404 + https://play.google.com https://net.chessatlas.app
H2 :1User ratings and reviews (stores, press)
https://apps.apple.com/app/id6770867404: 4.3/5 on only 3 ratings (< 100 reviews); Play not readable
H3 :1Interface languages available
at least two languages (French interface found, total number not recorded) — https://chessatlas.net/fr: fully French interface; moves in English SAN notation (1.e4 c5)
H4 :0Accessibility (keyboard, screen reader)
No accessibility mention on https://chessatlas.net/fr or https://chessatlas.net/features/opening-trainer
H5 :1Offline use and known incidents
No status page or offline mention on https://chessatlas.net; no incident found
IPreparation and study
3.3I1 :0Preparing for a named opponent
https://chessatlas.net/features/deviation-finder: "Opponent Novelties" aggregates opponents' moves from ONE’S OWN games; no report on a named player
I2 :1Annotating and sharing games (studies)
https://chessatlas.net/features/repertoire-builder: "Add notes to any position", !/? annotations; sharing by link not mentioned
I3 :1Entering a game played at a club (photo, scoresheet)
https://chessatlas.net/features/repertoire-builder: visual tree editor, moves entered on the board; no photo/OCR
I4 :2Searching your games (filters, position)
https://chessatlas.net/features/game-import: "Filter games by time control", games "tagged with their opening names for easy filtering"
JHuman coaching and community
1.7J1 :0Access to human coaches
No coach on https://chessatlas.net
J2 :0Size and activity of the community
No forum or Discord on https://chessatlas.net (Facebook/Instagram/YouTube links only)
J3 :0Tools for trainers, clubs and schools
No coach/club area on https://chessatlas.net/pricing
J4 :2Engagement mechanics (streaks, virtual currency, reminders)
https://apps.apple.com/app/id6770867404: streaks and leaderboards; no virtual currency on https://chessatlas.net/pricing
KPersonal data and interoperability
6.7K1 :2Exporting your data (games, repertoire)
https://chessatlas.net/features/repertoire-builder: PGN export of the repertoire; /privacy: PGN portability on request
K2 :3Protection of personal data (GDPR, hosting)
https://chessatlas.net/privacy: GDPR, ANKT SERVICES SAS (Angers), hosting on DigitalOcean Amsterdam, no advertising tracker
K3 :1Public API and source code
https://chessatlas.net/features/repertoire-builder: PGN only; no API; https://github.com/chessatlas with no public repository
Also, outside the grid
Features found that no criterion measures. They do not count towards the score.
- Opening course library included for free
- Tracking of novelties played by opponents
- Detection of repertoire gaps (uncovered positions)
Sources consulted
- https://chessatlas.net/features/game-import
- https://Chess.com
- https://chessatlas.net/features/opening-trainer
- https://chessatlas.net/features/deviation-finder
- https://chessatlas.net/features/repertoire-builder
- https://chessatlas.net/editorial-policy
- https://apps.apple.com/app/id6770867404
- https://chessatlas.net/blog
- https://chessatlas.net
- https://chessatlas.net/pricing
- https://darksquares.net
- https://chessatlas.net/features/spaced-repetition
- https://chessatlas.net/about
- https://github.com/chessatlas
- https://app.chessatlas.net
- https://play.google.com
- https://net.chessatlas.app
- https://chessatlas.net/fr
- https://chessatlas.net/privacy
- https://chessatlas.net/blog/how-to-import-your-games-from-lichess-and-chesscom-into-chessatlas
Services with a similar profile
The three services whose category profile is closest — a distance over the eleven scores, computed, never chosen.