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Get Extreme Difficult Sudoku 2500 old version APK for Android
There are 2500 extreme difficult sudoku puzzles! Free to play! Heat Your Brain!
For those of you who aren't satisfied with regular sudoku, we've put together a seriously perplexing puzzle collection!
There are five categories to choose from—Normal, Cross, Jigsaw, Cross Jigsaw and Inequality—each with 500 puzzles each, for a total of 2500 puzzles!
It's totally free to play!
If you solve every puzzle, you may be able to become a genius!?