How to Play Sudoku
Fill the grid so that every row, every column, and every
3×3 box contains the numbers 1 through 9.
Tap or click a blank square, then enter a number from 1–9.
Use Check Board to verify your entries. Easy allows 1 check,
Medium allows 2, and Hard allows 3.
Use Clear Board to erase all of your entered numbers and start that day’s puzzle over.
Made for the Vern Eide Signal
Developed by Tristan Lake