Ten levels, honestly calibrated
The weakness of most “easy” bots is that they play perfectly and just move quickly. MateStorm’s levels are tuned to a target rating, so a lower level genuinely plays like a weaker human — it misses tactics and hangs pieces — which makes it a fair, winnable opponent while you improve.
| Level | Feel |
|---|---|
| Beginner | Learning — makes real beginner mistakes |
| Casual | Relaxed home player |
| Novice | Improving beginner |
| Club | Solid local-club player |
| Strong Club | Sharp club player |
| Expert | Tournament regular |
| Candidate Master | Strong tournament player |
| Master | Very strong |
| International Master | Near top level |
| Grandmaster | Full engine strength — extremely hard |
Learn while you play
MateStorm isn’t just an opponent — it’s a coach that never interrupts. A live evaluation bar shows who’s ahead, and every move earns an instant verdict, from a brilliancy down to a blunder. You see why a move mattered as it happens, instead of waiting for a report at the end.
Because it’s a practice mode, Undo takes back your move (and the computer’s reply) as many times as you like — even after checkmate — so you can rewind and try a different plan.
Free, instant, and private
- No account needed — open Solo and start immediately.
- No ads, no paywall — solo play is free.
- Runs on your device — it even works offline once loaded.
- Sign in later only if you want your solo games saved to your history.
What powers it
The MateStorm engine is built on Stockfish 16 (NNUE) — one of the strongest chess engines in the world — running right in your browser. MateStorm adds the ten-level calibration, the move verdicts, and the whole experience on top, so you get world-class strength shaped into something you can actually enjoy and learn from.