What changes on Medium?
Medium drops about eight of the starting numbers you saw on Easy, and trims the number of signs too. That is a deliberate double squeeze: with fewer signs on the board, the ones that remain are almost all load-bearing, so it pays to read every single one carefully instead of hunting for the obvious row and column clues.
If Medium feels like a big jump from Easy, that is completely normal. Most kids spend a couple of weeks at Easy before Medium starts to click. For a refresher on the rules with worked examples, the Greater Than Sudoku page has the full walk-through.
Three sign tricks to try
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The chain squeeze
Find three or more squares linked by signs pointing the same way. The bottom of the chain cannot be 8 or 9; the top cannot be 1 or 2. On a four-square chain, that rules out three digits at each end.
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Squeeze from both sides
When a square already has a filled neighbour on each side, both signs clamp it at once. A square that has to be more than 3 and less than 6 can only be 4 or 5 — often just one of those survives the row and column check.
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Signs that hunt 1s and 9s
The digit 9 can never sit on the pointy end of a sign, and 1 can never sit on the open end. Sweeping the board for those two facts alone knocks a surprising number of candidates out.
How to spot a forced digit
A "forced digit" is when only one number can go in a square, no matter how you look at it. Spotting them is the main skill on Medium. Here is the order we recommend: check the row, check the column, check the 3×3 box, then check every sign touching the square. If that leaves one number, write it in.
Sometimes the row and column leave three or four options and a single sign knocks out all but one. That is the pay-off for learning Greater Than Sudoku — the signs really do the work for you.
On squares with no signs at all, solving feels exactly like classic sudoku. On signed squares, always remember to include that fourth check.
When you get stuck
- ✏️ Turn on Auto Notes — in this game it applies the sign rules and the chain squeeze for you
- 🔎 Tap Check to make sure every number you have written is still correct
- 💡 Tap Hint to fill one square (it counts in your stats, but that is okay!)
- ↻ Tap Undo to go back if something turned out wrong
Ready for the next step?
When Medium Greater Than Sudoku puzzles take you under 10 minutes, give Hard Greater Than Sudoku a try. Hard puzzles have far fewer starting numbers and you will need every trick from this page, plus a few more.
Frequently asked questions
How long should Medium Greater Than Sudoku take?
Most kids finish a Medium puzzle in 10 to 18 minutes. If it takes longer, that is fine — use Notes and tap Check whenever you want to make sure you are 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 and will be waiting when you come back.
Are there fewer signs on Medium?
Yes, about ten fewer than Easy. We also remove any sign the puzzle does not actually need, so the ones you can see are the ones worth reading.
Does Auto Notes take the signs into account?
Yes. Auto Notes only writes digits that are legal under all the rules at once, including the signs and the chain squeeze, so your pencil marks are always correct.
Try other sudoku games
Different rules, same friendly board. Pick a sibling puzzle to play next.