[sbohacek]

I'm currently grading an open book test as you describe. It turns out that someone put their attempt at answers on chegg.com shortly after I posted the test. The temptation to use chegg is too great for students to resist. When chegg has the wrong solution (which is often the case), students will doubt themselves and will go with the wrong chegg answer.

To be clear, the only goal of chegg.com is to help students cheat. The world would be a better place if chegg and its copies did not exist.

[ModernMech]

My solution to this is to use version control and have them record an explanation of their work. If they copy from chegg they also have to forge a commit history, as well as explain the code line by line. I’d like to see them do that without learning anything.

[vintermann]

This is a common thing in computer art e.g. demoscene competitions too.

[HanClinto]

What about seeding the system and putting your own (bad) answers up there ahead of time?