10 invitation cards were played in each competition (1st place — 5 tickets, 2nd place — 3 tickets, 3rd place — 2).
Blow Up the Town was taking place from May 7 to 25. Participants had to solve various tasks and obtain special keys (flags); these keys were to be submitted to the jury via a form on the participants’ personal pages. If the flag was valid, the participant gained the corresponding number of points. The participants could both warm up their brains before PHDays 2012 and see some most attractive places of Moscow by means of an interactive map.