ADVANCED VARIANT · HYPER
Hyper Sudoku Online
Hyper Sudoku adds four shaded 3×3 regions to the classic grid. Each shaded region must also contain digits 1 through 9 exactly once.
Hyper Sudoku rules
Classic row, column and box rules still apply. The four shaded regions beginning at rows and columns 2 and 6 add extra peer relationships.
Use the overlap
A digit excluded by a shaded region can unlock a classic box, and a classic box placement can complete a shaded region. Recheck both systems after every move.
Generated for one solution
The Hyper solver enforces all classic and extra-region constraints while carving clues, retaining a removal only when exactly one solution remains.
Phone and desktop play
Shaded regions remain visually distinct at mobile and desktop sizes without hiding the keypad or controls.