What changes on Medium?
Medium Color Sudoku starts with about a third of the squares filled in. That means a quick row scan won’t finish the puzzle on its own — you’ll need to combine rows, columns AND the 2×3 box rule to find each next colour.
If Medium feels like a big jump, take a break and warm up on a couple of Easy puzzles first. The Color Sudoku page has the full rules and worked examples.
Three colour-spotting tricks
-
Box scan
Pick a 2×3 box that already has four or five colours. Look at the missing ones and check which empty square each can go into based on the row and column rules.
-
Twin sweep
If two squares in the same row can only be red or blue, no other square in that row can be red or blue. That fact often unlocks a third colour somewhere else.
-
Same colour squad
Tap any filled colour and the board lights up every other square with that colour. It’s a fast way to spot which rows or columns still need that colour.
When you get stuck
- ✏️ Turn on Auto Notes for a clean candidate-map view
- 🔎 Tap Check — if you have a wrong colour, fix it before going further
- 💡 Tap Hint to reveal one square (it counts in your stats, but that’s fine)
- ↻ Tap Undo to step back if a placement turned out wrong
Ready for the next step?
When Medium Color Sudoku takes you under five minutes, try Hard Color Sudoku. Hard puzzles drop a few more givens and reward planning ahead.
Frequently asked questions
How long should Medium Color Sudoku take?
Most kids finish in 5 to 10 minutes. If it takes longer, that’s fine — use Notes and tap Check whenever you want to make sure you’re on track.
Can I switch back to Easy?
Of course — just tap the Easy tab at the top of the board. Your Medium puzzle saves automatically.
Why are there fewer given colours?
Fewer starting colours force you to use the box rule more. The board still has exactly one solution, but you have to combine all three rules to find it.
Try other sudoku games
Different look, same friendly logic. Pick a sibling puzzle to play next.