How to play
Sudoku studio
Six unique puzzles graded by the logical techniques used to solve them.
- Choose a cell and enter a digit with the number pad or keyboard. Each row, column and box needs 1–9.
- Use Notes to mark possibilities, Candidates to inspect allowed digits, and Undo to revise.
- Starter uses single candidates; Focused also needs single positions. Explained steps identify the technique before you apply it.
Original game instructions
Make room for a little daily focus. Everyone gets the same uniquely solvable puzzle each UTC day, with notes, hints, and automatic progress saving.
- Fill the grid so each row, column, and three-by-three box contains 1 through 9.
- Use Notes to keep track of possible numbers.
- Check highlights incorrect entries. Hint explains candidates first; tap again to reveal. Undo restores an entry.
- Solo and assisted times are separate. A new puzzle arrives at 00:00 UTC; an unfinished saved puzzle keeps its original date until you restart.
A little tip Start with a row, column, or box that already has plenty of numbers.
