According to Time dot com, Number Logic the Sudoku portal is one of the 50 coolest websites. They describe this Sudoku website as:
“Caught up in the current Sudoku craze?
This site offers a hefty supply of puzzles to tackle. Work independently or compete head-to-head against other registered users. There are three levels of difficulty; the site will time you (there’s a pause button if you need to take a breather) and, if you wish, “validate” your answers (and highlight any mistakes). You don’t have to sign in to use the site but you do if you want your scores recorded.”
Well I think it is worth to mention the Number Logic website and hope they will win (keep your fingers crossed). And don’t forget to bookmark this number logic site. Happy Puzzling!