Features — every Reality Check training mode

Improve

Puzzles

123,000+ rated puzzles from real games.

A huge, rated puzzle library drawn from real games — not artificial constructions. Your puzzle rating feeds straight into your RC Rating.

Solve puzzles →

Challenges

Curated sets that target one skill at a time.

Hand-picked challenge sets built around a single theme or skill, so you can train deliberately instead of at random.

Browse challenges →

TRacer

A rating check against the clock.

Take a 180-second rating check (Classic), or build a rated sprint with a Fischer clock, your own rating range and themes (Sprint). A fast, honest read on where you stand.

Start a sprint →

Blunder Check

Find the blunder. Fresh sets monthly.

Spot the mistake before it costs the game. New blunder sets every month keep your radar sharp.

Find blunders →

Play Real Games

Simulator

Play a whole GM game — and see how you measured up.

Replay a grandmaster's game move by move. At every turn you make your own decision, and we grade it against what the master actually played — ending with an Excel-style accuracy report of you vs the GM. Physical DGT board supported.

Try the Simulator →

Masters

The original reality check.

Drop into a real position from a master game and find your move. We grade you the way a strong human is judged — for the idea, not for matching Stockfish's top choice.

Play a master position →

Decision LabComing soon

Back the human or the machine.

Three positions a day where a grandmaster disagreed with Stockfish. Bet on the GM or the engine, then find out who was right. NYT-Connections for chess — a daily habit you'll want to share.

Join the waitlist →

Live Critical MomentsComing soon

Last night's blunder, as a drill — within the hour.

When an elite tournament round ends, we scan it for the turning points and turn them into drills while the game is still trending. Train on the moments the whole chess world is talking about. No other platform does this.

Join the waitlist →