Disclaimer: I am terrible at sudoku and don't play it much BUT this game is a very cool concept. It's immediately easy to understand what you're supposed to be doing as the player, and the full interactivity with the board is nice, it lets you look at the puzzle any way you want. I never won, but I did get a really lucky board where two 3s were right next to each other, got excited, and immediately lost the coin flip and submitted the wrong 3 as the fake clue.