GRG Sudoku is a number-placement puzzle with approximately 160,000 patterns in 9x9, 6x6, and 4x4 grids.

Sudoku is a puzzle game
you fill in unique numbers 1-9 for each row, column, and group!

You can play various patterns in different difficulties:
9x9 / 6x6 / 4x4
LEVEL 1 / 2 / 3

With about 160,000 patterns, you can train your brain by playing a lot every day!

Even for beginners, there's an easy '4x4' grid for daily brain training!
You can also challenge your speed since the playtime (elapsed time) is displayed.

For those who want to fully enjoy Sudoku
there's the '9x9' grid with approximately 60,000 patterns, so you can play for a long time!

Feel free to enjoy playing!