16×16 數獨

16×16 Sudoku, also known as Hexadoku or Super Sudoku, fills sixteen 4×4 boxes using the digits 1 to 9 plus the letters A to G. With 256 cells it is a serious test of stamina and bookkeeping: candidate marks become essential, and a single overlooked elimination can cost you minutes.

It is the grid for experts who have outgrown 9×9 and want the deepest pure-logic challenge a Sudoku can offer.

規則 · 學習