The threshold for selecting games for the database was a high one - the average Elo of games being over 2550 points. There are many world-class Nimzo-Indian specialists, but all of them have played the opening with both colours. World champion Magnus Carlsen has 96 games in it, 53 of which with White. As is the case in the Mega as a whole Viktor Kortschnoj has the largest number of games in the Nimzo-Indian Powerbase namely 271, of which 130 are with Black.