Just discovered this small piece of cake in internet, some time ago I was participating in the http://www.reddit.com/r/dailyprogrammer where every week they release 3 problems (easy, medium and hard) and you must solve it with any programming language and expose your solution on the comments where others may learn or help you to do things better.

Now is the same but with a RAW file and everyone is just how many juice the can come out from the image, and expose the different approaches and mind processes

http://www.reddit.com/r/photography/comments/2gdexu/official_weekly_raw_editing_challenge/