AlgoFights

I like it, but you'll need to determine what metrics the users will actually "fight" with, for example, would it be fastest to submission? If so a lot of people are going to go for the fastest solution they can write rather than the most performant (im thinking lots of loops in loops because it takes almost no problem solving), or if judged on the most performant code, why have them code in parallel when the most performant solution is going to result in 2 different answers and lengths of time taken.

If it was me making something like this, id try to "gameify" it, similar to how some games have you write code to move a character and make it turn based instead. E.g Tug of war, each player is given an algorithm, the the metrics of say: Speed of completion, memory used, execution speed and whatever else you want to score them on, and whichever answer is "better" moves the centre of the rope closer to that person dependent on how much of a difference in score there was between them and the opponent.

Would be interested in seeing how you get on with this project, its a good idea