Competition rules

N+1 Fish, N+2 Fish
1

What are the rules about the types of methods that we can use. I.e. do they need to be open source? Free? Easy-to-understand?
Thanks

2

Full competition rules are available here:
https://www.drivendata.org/competitions/48/identify-fish-challenge/rules/

Relevant to this question is the “Prizes and conditions” section.

3

Thanks. I hadn’t clicked the “Compete” button.