TChess: Chess Puzzles, Tactics

Optivio Automation

In-app purchases

About this game

TChess is a chess trainer that runs entirely on your phone. 60,000 chess
puzzles, a full chess engine and eight opponents — bundled in the app, working
with no connection.

No ads. No account required. The whole tactics app is free.

SOLVE CHESS PUZZLES
• 60,000 real chess puzzles from the Lichess open database
• 17 tactical themes — forks, pins, skewers, discovered attacks, back rank
mates, deflection and more
• Puzzle of the day, Puzzle Rush (3 min, 5 min, survival) and three-life
sessions
• Your puzzle rating moves as you solve, using real Elo maths
• Every puzzle you get wrong comes back on a spaced-repetition schedule until
it stops catching you

PLAY CHESS AGAINST BOTS
• Eight chess opponents from 600 to 2400, each with a genuinely different
style — one really will sacrifice a rook for an attack, because that is how
it evaluates the position
• Atlas: the chess engine itself, at any strength you set
• Endgame trainer: king and queen, king and rook, opposition, rook endings

LEARN CHESS TACTICS
• 24 lessons across 6 courses — pins, forks, skewers, discovered attacks
• Each lesson is a concept, three puzzles and a quiz

ANALYSE YOUR CHESS GAMES
• Full game review powered by a real chess engine: an accuracy score, an
evaluation graph, and your three costliest moves with the move the engine
wanted instead
• Free analysis board with live evaluation
• Import a game by PGN or set up any position by FEN

WATCH TACTICS
• A tactics feed that animates the solution to a real chess puzzle, move by
move, rendered on your device — no video, no streaming, no data used

WORKS OFFLINE, ALWAYS
The chess puzzle database and the engine ship inside the app. There is no
loading screen waiting on a server, because there is no server in the way.
Solve chess puzzles on a plane, on the metro, anywhere.

TCHESS PRO — THE OPENINGS, IF YOU WANT THEM
Everything above is free forever. Pro adds the opening half of chess, and
these are built and in the app today:

• Opening Explorer — push moves on the board and see what 4.5 billion real
games did next, win/draw/loss per move, masters or club players
• Opening Library — every named opening there is, 3,810 of them, browsable by
first move and family
• Opening Practice — play the theory move while the database answers back
from real games, not from a script
• My Repertoire — import any PGN and TChess drills it by spaced repetition,
by POSITION, so a line you know is known however your opponent transposes
• AI Coach — paste a game and have every mistake explained in plain English,
grounded in the engine rather than guessed at

Monthly, annual and one-time options. Everything else in TChess stays free.

OPTIONAL ACCOUNT
Sign in and your rating, streak and achievements follow you between the phone
app and the web app at tchess.app. Your tactics progress is never locked
behind it.

WHO IT IS FOR
Beginners learning chess tactics, club players drilling patterns, and anyone
who wants a chess app that is honest about what costs money and what does not.

What’s new

Settings shows each board theme on a real board now, not two colour swatches. Smaller polish across sign-in, onboarding and the lesson screens.