Since it first achieved international popularity, the game of sudoku has captured the attention of an enthusiastic puzzle solving audience. It’s no surprise then that innumerable variants of this popular puzzle game have developed. If you’re a sudoku fan looking for a new challenge, why not give a few of these a try:

There are almost as many different types of puzzles out there as there are people. This is because everyone thinks a little bit differently and so everyone who creates puzzles or solves them challenges themselves a little bit differently. Still, there are a number of well-known and popular types of puzzles out there for you [...]