> A standard question might be "Build a chess game in 4 hours". Now that's clearly impossible. That doesn't sound impossible at all. I am sure I could do it in

> A standard question might be "Build a chess game in 4 hours". Now that's clearly impossible. That doesn't sound impossible at all. I am sure I could do it in a weekend, and pretty sure I could do it in a day, if strongly motivated and well rested. So, maybe a more skilled person than me could get it done in 4 hours, although it would definitely be impressive and I would expect anyone who can do it, already has done bits of it before (eg they already know their graphics library well, and have implemented alpha-beta search or something for the AI part before -- those are the only two hairy parts, other than that chess is pretty simple) I think my point is that the question is mostly selecting for experience-- someone who has already implemented parts of it before will be able to do it so much faster. If you don't have a graphics library you already are comfortable with, for example, forget it, that's gonna eat up days on its own.