Can You Solve the 10 Hardest Logic Puzzles listed here?

Finished the sudoku, it took almost the whole day.

There's basically nothing to work with. There are few pairs, and even after filling out all the possible numbers of each cell, there are no obvious cells. It took 6 correct "50/50" guesses (excluding a lot more incorrect guesses, which would just make me start over from a certain point) to logically fill the rest in.
 
Finished the sudoku, it took almost the whole day.

There's basically nothing to work with. There are few pairs, and even after filling out all the possible numbers of each cell, there are no obvious cells. It took 6 correct "50/50" guesses (excluding a lot more incorrect guesses, which would just make me start over from a certain point) to logically fill the rest in.

Finished the sudoku on some long car rides today also.. Holy crap that was hard.
 
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