Daily puzzles

Date Puzzle Best score
2026-07-02 (competitive) Squares and Rectangles (9x9) 2m 34 s
2026-07-01 (competitive) Difference Sudoku (8x8) 2m 7 s

The <Efficiency> value provides a normalized value based on solving time and aligned with the rating calculation.

Click at the puzzle name to solve the selected puzzle. Puzzles which are older than 5 days are non-competitive and can be attempted without registration.
Click at the best solving time value to see the score table for the selected puzzle.

Choose year:   2020   2021   2022   2023   2024   2025   2026