If you consider yourself an expert solving sudoku and you are already bored of the classic games because of how simple they are then the time has come to face Sudoku Sensei 2.0 with which you will reach more complex games that will help you considerably improve your technique and so on If you become an expert among the experts.
You have several modalities (some of them truly complex) such as the popular Sudoku Samurai as well as others equally complicated as Triplex, Heart, etc.
Note that given the complexity of some games you can request help at certain times to the program to advise you how to continue playing so as not to get blocked.
You can free download Sudoku Sensei 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.