A Sudoku puzzle is a 9x9 grid with 81 cells. The grid is divided into nine 3x3 squares.
The goal is to fill in the grid with the numbers 1–9, without repeating any numbers in a row, column, or 3x3 square.
Correct numbers will appear in green.
Incorrect numbers will appear in red and will show correct number instead.
Select the square, then enter the number by keyboard to submit it.
Completed Sudoku with incorrect answers.