📝 Sudoku Rules
Sudoku is a 9×9 grid divided into 9 blocks of 3×3.
Goal: Fill the grid with numbers 1 to 9 while following three rules.
✅ 1. Row:
Each row must contain the numbers 1 to 9 exactly once.
✅ 2. Column:
Each column must contain the numbers 1 to 9 exactly once.
✅ 3. 3×3 Block:
Each block must contain the numbers 1 to 9 exactly once.
🧠 Quick Tips:
No duplicates in a row
No duplicates in a column
No duplicates in a 3×3 block
Allowed numbers: 1 to 9
Pre-filled cells must not be modified