About the game
Classic sudoku with an extra twist: the two long diagonals from corner to corner must hold 1 to 9 as well. Two more lines to fill, and two more lines to reason with.
Rules
Fill the grid so that every row, every column and every 3×3 box holds each number from 1 to 9 exactly once.
Each of the two long diagonals (the dashed lines) also holds every number from 1 to 9 exactly once.
Every puzzle has exactly one solution, so it can always be found by reasoning, without guessing. A number that breaks a rule turns red.
How to play
- Tap a cell, then a number below the board (or type it).
- The two long diagonals hold 1 to 9 once too.
- Not sure? Switch on notes and pencil in the options.
- Languages
- EN · DE
- Works on
- Phone, tablet, computer
- Players
- Just you