Hi, trying to do my best with above i've got an idea for the first special quiz. I propone to give a special quests to make some method possibly light in op time sense. Structure of a quiz: 1. Problem - make Your best algorithm. 2. Experience - You get i.e. 20xp for first. 3 Loosings - if someone will build lighter code, (s)he gets 21XP but You loose 19XP. 4. Badges - i.e. One-Man-Army for 3 good codes. I think it's a very powerfull contribution for a developers society and end-users also.