16x16 Sudoku Solver

Use this 16x16 Sudoku solver (factor 4) to verify a large puzzle, catch conflicts, or complete a partially filled grid. Enter digits 1 to 9 and letters A to G, then select Solve Sudoku.

How to use this 16x16 Sudoku solver

Add the clues from your puzzle and leave unknown cells blank. A valid 16x16 Sudoku requires each row, column, and 4x4 box to contain each symbol from 1 to 9 and A to G exactly once.

Need another Sudoku page?

Solve a standard 9x9 Sudoku grid, try the quick 4x4 Sudoku solver, or play a fresh 16x16 Sudoku puzzle.