A little room to think
Daily Sudoku
One easy puzzle. One solution. A fresh start, every day.
Choose a square, then a number. Use 1–9 and arrow keys on a keyboard; Backspace erases.
Clear your entries and notes for this puzzle?
Progress stays in this browser. No sign-in needed.
The daily ritual
Fill each row, column, and 3 × 3 box with the digits 1–9, once each. Every puzzle can be solved with simple singles, without guessing.
Everyone gets the same puzzle for the day. A new one appears at midnight in India (Asia/Kolkata, UTC+5:30).
How the puzzle is made
A date-seeded, randomized backtracking algorithm builds a complete grid. Clues are removed only when a solution-counting backtracking search confirms exactly one solution and a logical solver can finish using naked and hidden singles. The date and a fixed generator version keep the daily puzzle consistent.
Today’s puzzle becomes available at midnight in India. Future dates do not generate or show a puzzle. Past dates reconstruct the same frozen, versioned board, so returning to a day never gives you a different puzzle. Progress stays in this browser; there is no shared server archive.