🍃 A fresh take on Sudoku

Play Windoku Online

Classic Sudoku with four extra windows. Fresh daily puzzles, every day.

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Current Streak0 days

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Best Streak0 days

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Choose a Windoku Difficulty

Play today's surprise level or choose your own challenge.

Daily Puzzle

One shared level chosen fresh each day.

Easy

Learn how the four windows change the grid.

Medium

A balanced everyday Windoku challenge.

Hard

Fewer clues and tighter deductions.

Expert

A serious test for experienced solvers.

How Windoku works

Windoku, also called Window Sudoku or Hyper Sudoku, follows every classic Sudoku rule. In addition, each of the four shaded 3×3 windows must contain the digits 1 through 9 exactly once.

The shaded areas create new relationships across the board, giving familiar Sudoku logic a fresh rhythm. Your progress, notes, streak and daily result are saved on this device.