Letter Sudoku Puzzles
Grab your free printable letter Sudoku puzzles and have some fun! We've got puzzles for all skill levels; easy, medium, and hard. So whether you're just starting or a Sudoku pro, there’s something for you. These puzzles are a great way to keep your mind sharp while enjoying a good challenge. Play online or print them out and solve them whenever you like!
6x6 Letter Sudoku - Medium - 7
6x6 Letter Sudoku - Medium - 8
4x4 Letter Sudoku - Medium - 9
6x6 Letter Sudoku - Hard - 3
4x4 Letter Sudoku - Hard - 2
4x4 Letter Sudoku - Hard - 5
4x4 Letter Sudoku - Hard - 4
4x4 Letter Sudoku - Easy - 8
4x4 Letter Sudoku - Easy - 9
4x4 Letter Sudoku - Easy - 7
4x4 Letter Sudoku - Easy - 6
4x4 Letter Sudoku - Easy - 5
4x4 Letter Sudoku - Easy - 4
4x4 Letter Sudoku - Easy - 3
4x4 Letter Sudoku - Easy - 2
Basic Rules / How to Play
The general rules remain the same as number-based Sudoku, with the only difference being the use of letters instead of numbers.
- Grid Size: The puzzle has typically 9x9 grid size made up of three 3x3 sub-grids. The other variation can be of 4x4, 6x6, 10x10, 16x16 etc.
- Rows: Each row must contain all unique letters (no repetitions).
- Columns: Each column must contain all unique letters.
- Box: Each 3×3 subgrid (or region) must also contain all unique letters.
- Word-Based Sudoku (Special Case): Sometimes, the puzzle uses a specific 9-letter word, and every row, column, and subgrid must contain all the letters of that word exactly once.
Need Help?
To get started, check out these instructions, goals and rules for how to solve Alphabet Sudoku
