Sudoco

Sudoco is Sudoku made quiet. Ink on warm paper, a soft koto in the background, and nothing rushing you.

EVERY PUZZLE PLAYS ITS OWN MELODY
Each correct digit plucks a note on a Japanese koto. Finish a row, column or box and it rings a chord. Solve the puzzle and the whole scale sings. No two games sound the same.

EVERY PUZZLE LEAVES A PAINTING
Beneath each grid hides a sumi-e ink painting: bamboo in the wind, mountains at dawn, plum blossoms, a moon over the sea. Each correct cell reveals a little more. Solve the puzzle and the painting is yours to keep in your gallery.

FAIR, CLEAN PUZZLES
• Every puzzle has exactly one solution and never needs guessing
• 5 levels: Easy, Medium, Hard, Expert and Master
• Difficulty is graded by the techniques you actually need, so Hard really is hard
• A new daily challenge every day, the same for everyone

HINTS THAT TEACH
A hint doesn't just fill a cell. It shows you the step and explains why, from a simple single up to X-Wing and Swordfish.

EVERYTHING YOU EXPECT
• Notes, with auto-removal when you place a digit
• Undo and erase
• Optional 3-mistake limit
• Highlights for the row, column, box and matching digits
• Stats and best times for every level
• Light paper or dark paper
• Works offline
• 11 languages

Take a breath, pick a level, and let the ink fill the page.