The only other rule is that no two adjacent cells - including diagonal ones - can contain the same number. the more logic steps are required to solve the puzzle. A "Solve One Cell" option with a walkthrough is available if you get Grids can be of any size - initially there are puzzles of sizes 5x5, 6x6, 7x7 and 8x8. There are three levels of puzzles

The cells in each puzzle grid are divided into groups (or clusters/containers) and each group contains the numbers 1 to n, where n is the number of cells in the group.Suguru puzzles are quite different than Sudoku, so you'll want to read these rules carefully: You'll see that the grid is subdivided into containers or cages, each of which is 1 to 5 cells in size. You need to fill each container with unique digits, counting up from 1. So for example a 2-square container contains the numbers 1 and 2. A 5-square container contains the numbers from 1 to 5. Adjacent (touching) cells may never contain the same number, and this includes diagonally adjacent cells. That's it!