On this 60 minutes video, we will cover a surprise weapon known as the 'Glek' Four Knights with 4.g3, named after inventor, Grandmaster Igor Glek. This is an excellent anti-Petroff device, perfectly sound and can come as a shock to the unprepared.
It is worth noting that Richard Rapport used this variation to defeat Duda in the recent Candidates tournament , which speaks volumes for the validity of the opening. White is often looking to launch a kingside attack in this line, although he will have to get his knight on f3 out of the way before he can play f2-f4. He also has options in the center and can play either d2-d3 or d2-d4, according to circumstances. An aggressive central advance is something White players should look out for when they play the Glek Variation. These are sharp ideas, far from the often dreary reputation that the Four Knights holds. Below master level, I imagine these ideas will not be that well known to the vast majority of players. Black could easily slip into a poor position without even realising it!