How to play: Fill the grid so every row, every column and every 3×3 box contains the digits 1 through 9 exactly once.
Every row, column and 3×3 box needs the digits 1–9 exactly once. Each puzzle is generated fresh with a single unique solution.
Tap a cell, then a number (keyboard works too). Wrong entries cost 100.
Tap a cell, then a number · wrong entries flash red and cost 100 · faster solves score more.
More Guac Arcade games
How to play Guac Sudoku
Fill the grid so every row, every column and every 3×3 box contains the digits 1 through 9 exactly once.
Tap a cell, then tap a number on the pad (or use your keyboard). Wrong entries flash red and cost 100 points; the counter keeps score of your mistakes.
Every puzzle is generated fresh with exactly one solution — Easy keeps 40 clues, Medium 32, Hard 26. Faster, cleaner solves score higher.
Tips & tricks
- Start with the digits that already appear most on the board — placing the eighth and ninth copy of a number is nearly free.
- Scan box by box asking "where can the 7 go in THIS box?" — one-box logic solves most of Easy and Medium.
- Selecting a cell highlights its row, column and box; selecting a filled number lights up its twins. Use both constantly.
- On Hard, hunt for cells with a single candidate before anything clever — nakeds singles hide in plain sight.
Guac Sudoku is part of the free Guac Arcade from GetGuac — money's wingman. Signed-in players earn +50 GuacMoney for the first finished round of each game every day. If outsmarting the arcade feels good, wait until you do it to your own spending: see how GetGuac works.