1 to 9 must appear in each row, column, and 9-cell region. The grey square indicates an even digit. Any two orthogonally adjacent digits must have a difference of two or less.
If you prefer to play directly in sudokupad then click below.
1 to 9 must appear in each row, column, and 9-cell region. The grey square indicates an even digit. Any two orthogonally adjacent digits must have a difference of two or less.
If you prefer to play directly in sudokupad then click below.