Zen Grid

How to play

1. Goal: Fill the 9x9 grid so every row, column,
   and 3x3 sector contains numbers 1-9.
2. Rules:
   • Each number 1-9 appears once per row.
   • Each number 1-9 appears once per column.
   • Each number 1-9 appears once per 3x3 box.
3. Start: Some numbers are already placed.
   Use them as clues.
4. Play:
   • Use intersections of rows, columns, and boxes to exclude impossible numbers.
   • Use logic (not guessing) to fill empty cells.
5. Win: The puzzle is solved once all cells are filled correctly.
6. Done? Click on a preferred difficulty to start a new game or on the Restart button to try again.