Four difficulties, one clean interface
From a relaxed 5-minute easy grid to a logic-intensive diabolical board. Casual mode lets you play without pressure. Ranked mode tracks your performance and builds a real rating over time.
Sudoku worth coming back to
Four difficulty levels, a shared daily challenge, ranked play with a persistent rating, and a printable version for offline sessions. Free to play, no account required to start.
One board, shared every day
Every player solves the same puzzle each day. Finish in casual or ranked mode, compare your result on the leaderboard, and come back tomorrow for a fresh challenge.
From the Journal
View allThe Sudoku Journal
How ranked mode works
Each ranked game updates your Chill Rating based on solve time and accuracy. Compete on weekly and seasonal leaderboards, build a streak, and watch your rank improve with consistent play.
New to Sudoku?
The guide covers the rules and core solving techniques in one short read. Start with easy puzzles, pick up the patterns, and work your way up at your own pace.