How to Play

• Each row must contain all numbers from 1 to N (where N is grid size) without repetition
• Each column must contain all numbers from 1 to N without repetition
• Each subgrid (√N x √N) must contain all numbers from 1 to N without repetition
• Click on a cell to select it, then type a number to fill it
• Press Delete or Backspace to clear a cell