Flower Sudoku

A Sudoku in bloom. It plays exactly like the classic puzzle, except the nine 3×3 boxes are replaced by nine irregular, coloured petal regions that curve across the grid.

The idea behind Flower Sudoku

Flower Sudoku belongs to the jigsaw family of Sudoku variants, where the neat 3×3 boxes are swapped for regions of unusual shape. Here those regions are drawn and coloured as petals, so the board looks like a flower while you solve it. The change is more than decoration. Because the regions wind across the grid instead of sitting in tidy squares, the logic runs in fresh directions, and a puzzle that would be routine in classic form becomes a new challenge. The colours are not only pretty; they make each region easy to follow at a glance.

How Flower Sudoku works

Fill the 9×9 grid with the numbers 1 to 9 so that each row, each column, and each coloured petal region contains every number exactly once. The rows and columns behave precisely as they do in ordinary Sudoku. Only the third constraint has changed: instead of every 3×3 box, it is now every petal. Keep that one swap in mind and everything you know still applies. Each board is generated with a single unique solution, reachable by logic alone. If you already play classic Sudoku you will feel at home within the first few moves, and only your sense of where each region lies needs to adjust.

Why the petals change the puzzle

In classic Sudoku the nine boxes are always the same nine squares, so your instincts about where a number can hide are fixed. In Flower Sudoku every region takes its own path, and a number blocked by a petal in one puzzle may be free in the next. This forces you to look at the region borders rather than rely on habit. A useful technique carries over unchanged: when a petal is missing just one number and only one of its cells is open, that cell is settled. Scanning each petal, row and column for that situation is the heart of the solve.

Tips for solving a jigsaw board

The trick with any jigsaw Sudoku is to treat the coloured region exactly as you would a 3×3 box, and to let the border, not habit, tell you where a region ends. A few pointers help. Follow one colour at a time when you scan, checking which numbers that petal still needs. Watch the cells where a petal reaches across several rows or columns, because those are where the region constraint does its most surprising work. And use pencil notes freely: on an irregular board they are worth even more than usual, since you cannot fall back on the tidy geometry of the classic grid. Once you start reading the petals as naturally as boxes, Flower Sudoku plays as smoothly as any other variant.

Everything you expect from Sudoku

• Pencil notes for tracking candidates across the winding regions.
• Hint, undo, redo and erase, plus a pause button and a running timer.
• Three difficulty levels, each a fresh board with a single solution.
• Conflicts are flagged the moment a number repeats in a row, column or petal, so mistakes never hide for long.
• Automatic saving and the site's light or dark theme.

More ways to play

If the colour is what draws you, Color Sudoku replaces the numbers entirely with shades. For a sterner test, Killer Sudoku adds cage sums on top of the rules, and Expert Sudoku pushes the plain grid to its limit. To return to the familiar board, the classic game is always ready at Sudoku AZ.