Autosave — Your current game is saved in your browser after every move. If you leave the page, you'll be able to resume exactly where you left off. Saves are kept for 7 days.
Settings ⚙️ — For advanced players, the gear at the top of the page turns on the ✏️ Auto button: it fills in every candidate of the grid at once, or only the cleaned candidates (sign comparisons done, locked candidates removed). This second option counts as a hint: the game won’t count towards “No hints”. You’ll also find large print there, for easier reading.
Greater Than Sudoku stats — They are kept separate from your classic 9×9 sudoku stats and the other variants. They're stored locally in your browser and never sent to a server.
Greater Than Sudoku: signs between the cells
Greater Than Sudoku takes the classic 9×9 grid and adds < and > signs between the neighbouring cells of each 3×3 box. Each sign compares two cells: the larger one is on the open side, the point faces the smaller one. All the classic sudoku rules still apply.
These signs change the way you play. There are 12 in each box, 108 in the grid: they replace most of the givens. On easy, about ten numbers are placed to get you started; on medium, a few; on hard, none at all: the grid starts empty and everything follows from the signs.
Sudoku-Land offers 3 levels (easy, medium, hard), notes mode, a step-by-step solver for hints, autosave, a dark theme and the ⚙️ Settings menu. Every puzzle has a single solution and cannot be solved without the signs: each one has been checked individually.
Greater Than Sudoku rules
- Just like classic sudoku — every row, every column and every 3×3 box contains the numbers 1 to 9, once each.
- Signs compare two neighbours — between two side-by-side cells of the same box, the > or < sign tells you which one holds the larger number. Between two cells one above the other, the point faces up or down.
- No signs on the thick lines — signs only link cells of the same box.
Tips for solving a Greater Than Sudoku
- Find the 1 and the 9 of each box — a 1 never goes in a cell that is greater than one of its neighbours, a 9 never in a cell that is smaller. Often only one cell of the box is left.
- Follow the chains of signs — a cell greater than a neighbour, itself greater than another cell, is at least 3. The longer the chain, the higher the bound.
- Count the smaller cells — in a box, all the numbers are different: a cell greater than four cells of its box, following the signs, is at least 5.
- Let your notes do the sorting — with the ✏️ Auto button in the ⚙️ menu, the notes take the signs into account: no 1 in a cell greater than a neighbour, no 9 in a cell smaller than one, and the right side of every placed number.
All the grids on Sudoku-Land
Frequently asked questions
What is Greater Than Sudoku?
It is a 9×9 sudoku where every 3×3 box has < and > signs between its neighbouring cells. Each sign tells you which of the two cells holds the larger number: the point faces the smaller one. The classic sudoku rules stay the same.
Why does the puzzle start with so few numbers, or none at all?
Because the signs tell you a lot: there are 12 in each box, 108 in the grid. They are enough to fix the solution with very few givens. On hard, the grid even starts empty: everything follows from the signs.
Where do I start on a grid with no numbers at all?
Look for the 1 and the 9 of each box. A 1 never goes in a cell that is greater than one of its neighbours, a 9 never in a cell that is smaller: often only a few cells are left. Then follow the signs: a cell greater than three cells of its box, following the signs, is at least 4.
Does the Hint button work like in classic sudoku?
Yes: the Hint button opens a step-by-step solver that takes the signs into account. It explains each deduction on a small grid with the signs drawn in, for example “its neighbour is at least 4: so it is at least 5”. Reading the steps is free; only “Apply this move” uses up a hint.