Cloud Mistake Memory
Every saved position and its review timing stays protected in your private account.
PREMIUM · PERSONAL MEMORYNever lose a
Never lose a
chess mistake.
Premium turns useful positions into a private memory system that follows you. Your saved mistakes, review timing, and repertoire stay connected across every device.
FREE VS PREMIUMThe board is free.
The board is free.
Your memory travels.
Free gives you the complete training floor. Premium protects the personal layer you build on top of it—the positions, timing, and opening work that belong to you.
| What you get | Free$0 | Premium$3.9961% off · one year |
|---|---|---|
| Original puzzle library | 6,000 positions | 6,000 positions |
| Full games, hints + blue guides | Unlimited | Unlimited |
| Saved Mistake Memory | This browser | Private cloud |
| Review schedule | One device | Every device |
| Opening repertoire | This browser | Synced |
| Automatic backup | — | Included |
| Product feedback | Community | Direct line |
Everything playable stays free.Premium makes every lesson portable and protected.
Choose PremiumWHAT YOU UNLOCKYour training,
Your training,
still there tomorrow.
Review anywhere
Start a review on your phone and continue the same queue on your laptop.
Synced repertoire
Keep your white and black opening branches with the rest of your training memory.
Automatic backup
Changing browsers or devices no longer means rebuilding the lessons you already earned.