ALPHADOKU LETTER SUDOKULetters. Logic.
A little discovery.
Classic hides a nine-letter word or phrase in one row or column. Mega is a larger, pure alphabet Sudoku: A–Y, with no hidden line. Both are free to play, with progress saved in this browser. Mega needs a desktop or laptop screen.
One hidden line.
A whole new Sudoku.
Nine unique letters. A word hiding in plain sight. Four levels to find your rhythm.
Play Classic ↗More letters.
A little more ambition.
A to Y, twenty-five boxes, and room to think. Pure alphabet Sudoku, without a hidden line. Made for a desktop or laptop.
Play Mega ↗A fresh puzzle.
A familiar little ritual.
Daily Classic. Weekly Mega. Shared challenges with no race to the finish. Missed a day? The archive is yours to explore.
Explore challenges ↗Make time for a little thinking.
One space. One possibility.
This row uses A to I exactly once. Which letter is missing?
No timer. Take a moment.
Good puzzles teach you
how to see differently.
Start with a single missing letter. Learn to spot pairs, follow candidates, and make a deduction you can explain.
Explore the technique library →