Sunday, August 23, 2026
Every day at midnight UTC, three new challenge puzzles go live — one for each division. You get a single attempt per puzzle, your time lands on that day's leaderboard, and finishing keeps your daily streak alive. Miss a day and the streak resets; that is what makes it a challenge.
Each day's puzzles are drawn from our bank and rated with the Sudoku Explainer scale, so a Tuesday expert grid is genuinely comparable to a Thursday one. One attempt means one attempt — there is no replaying for a better time, which keeps the leaderboard honest. Alongside the daily there is a tougher weekly challenge that runs Monday to Sunday.
Not ready for the clock? Play a casual puzzle first, brush up on solving techniques, or take the printable puzzles offline. The daily print sudoku mirrors this challenge on paper.