Blog
Guides & updates
How to solve faster and cleaner, and what's changing in Ranked Sudoku as we build it.
- How We Calculate ELOGuide
The formula behind your rating: expected score, K-factor, placement races, and why only your side of a race ever moves.
- A Native App Is Coming — Install Ranked Sudoku NowProduct Update
A native app is planned, timeline isn't set yet. Until then, the installable web app gets you most of the way there.
- How Ranked Sudoku WorksGuide
A plain-language walkthrough of ranked matches, replayed matches, ELO, and the Daily Game — and a look at what's coming next.
- How to Lower Your Effective TimeGuide
Effective Time is raw time plus 10 seconds per mistake — so the fastest way to improve it usually isn't going faster.
- 5 Sudoku Mistakes That Cost You RacesGuide
The errors that don't just slow you down — they add seconds to your Effective Time, or end the race outright.