Chess Atlas

Chess Atlas is a pocket chess workstation for players who prepare seriously.

One screen holds everything: your opening book, the engine, 11 million master games, and your training drills. The board stays put — every tool slides under it.

Opening preparation that goes with you
Build your White and Black repertoires directly on the board. Every line you add is instantly trainable and searchable. Import PGN files from coaches, databases, or your own games — pick which games to
include, choose your color, set a depth limit, and your book grows. Your prep lives on your device, not a cloud you can't access at the tournament hall.

Three ways to drill your book
Line Drill walks you through a full line from the root position — the app plays the opponent side, you find each move. Position Quiz fires random positions from your book as flashcards — one move at a
time, no context, just recall. Sequence Drill asks for the next 3 moves from any random position in your book, with the opponent responding after each. Every session ends with a report: accuracy, time, and
the exact positions you missed.

Stockfish 18, offline
Tap the engine chip and Stockfish 18 spins up — depth, eval, and up to 3 candidate lines. Runs entirely on-device. No internet needed. From any position in a drill, hand off to the engine and play out the
line.

11 million master games, at your position
The live database is cloud-backed and searchable by player, ELO range, and year. The on-device database works without a connection. Both filter to the position on your board — so you see how masters
handled exactly what you're studying.

Opening Explorer with real win rates
Every reply at every position, weighted by frequency and result from master play. Your own prepared moves appear first in My Book view — then opponent tries, ranked by how often they appear in the
database.

Position watches with push notifications
Pin positions from your repertoire. Every time a new master game reaches one, you get a push notification with the game ready to review. Set a minimum ELO filter so only relevant games land.

Your game library, organized
Import PGN collections — your own games, your coach's files, tournament databases. Read annotations and comments exactly as written. Collections stay on your device.

Free during launch
The live database and opening explorer are free for every user during the launch window — no subscription needed.