How to play 16×16 Sudoku
Standard Sudoku rules, scaled up. Each row, column, and 4×4 box must contain each of the 16 hexadecimal symbols (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F) exactly once. Type a symbol or tap the pad to place; toggle notes to jot candidates. Give yourself time — a 16×16 grid can take an hour or more.
FAQ
What is 16×16 Sudoku?
A giant Sudoku played on a 16×16 grid split into 4×4 boxes. Cells hold digits 0–9 plus letters A–F (hexadecimal), one of each per row, column, and box.
How long does a 16×16 Sudoku take?
Expect 30 minutes to two hours depending on difficulty — 16×16 rewards patience and disciplined notes.