2006: there was a local qualification round at each University.
2008: the local qualification round was made invalid about a week before the competition so a lot of Universities had already hosted their local competitions for nothing… It was a good practice session for the optimists.
No competition was hosted in 2007 as it was too much effort for the committee to evaluate by hand the submissions of the 44 teams which included using dead programming languages and writing poems.
2009 – 2012 no professional support on the grader (volunteers only). System would occasionally crash and judges would have to monitor the system constantly to reset the various modules that would get stuck.
After 2013 free t-shirts for everyone had to stop with the increase of the expenses and thus one of the major reasons for the decrease.