Suguru is a great new Japanese logic number puzzle with only two very simple rules.
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.
So a group that has 5 cells will contain the numbers 1 to 5.
The only other rule is that no two adjacent cells - including diagonal ones - can contain the same number.
Despite these two rules, some puzzles can be incredibly challenging to solve.
As usual, all puzzles on this site are solvable by logic alone.
Grids can be of any size - initially there are puzzles of sizes 5x5, 6x6, 7x7 and 8x8. There are three levels of puzzles - Easy, Hard and Tough. Within the Hard and Tough levels, the puzzle difficulty can vary substantially - we have attempted to put a rating on each puzzle. The higher the rating, the more logic steps are required to solve the puzzle. A "Solve One Cell" option with a walkthrough is available if you get stuck.
There is one new puzzle per level per grid size each day.
It is suggested you follow the Walkthrough of a puzzle to get you going.
Participate in the daily challenge to try make it on the leaderboard. Each day (US Eastern Standard Time) you can solve the same puzzle as everyone else. The puzzle size will either be 6x6 or 7x7 and the level will vary from day to day. You will need to register and login first to play. Registration is free and takes less than a minute.
A paperback book of Suguru puzzles is now available from Amazon.