Classic sudoku. And a real 1v1 Battle.

Six difficulties, from Easy to Extreme, with educational hints that teach you the technique instead of just filling the cell, and a brand new daily challenge every day. Whenever you feel like competing, challenge a real opponent in 1v1 Battles: you both solve the exact same sudoku at the same time, and whoever finishes first wins.

🕒 Coming soon to Google Play

How it works

Six difficulties

From Easy to Extreme, with progressive unlocking: each level opens up after completing a handful of the previous one, just like the big reference sudoku apps.

Hints that teach

The first hint for each real technique (a hidden single in a row, column or block) explains the reasoning step by step instead of just filling the cell.

1v1 Battles

Same sudoku, same moment, two real players. You see your rival's progress live; whoever completes the board first wins.

Screenshots

Orfeo Sudoku home screen, with the daily challenge and the New game button

A sudoku game in progress in Orfeo Sudoku, Medium difficulty

Orfeo Sudoku's 1v1 Battles screen, with the difficulty selector

Orfeo Sudoku's daily challenges calendar

Orfeo Sudoku's Statistics screen, with real progress data

Orfeo Sudoku's Awards screen, with the monthly trophy calendar

A full game, start to finish

Real recording of a game in Orfeo Sudoku, sped up — all the way to the victory screen with the new record.

What's behind it

Free with respectful ads: a banner at the bottom and, at most, one full-screen ad every 3 new games — never in the middle of one.
No account needed to play solo: your progress, stats and achievements are stored on your phone. 1v1 Battles use an anonymous identifier, no email or password.
The Battles world ranking is optional and only uses your Google account if you choose to check it.
You can change your ad consent from "Me → Privacy preferences" at any time.