[1] In 2012 he won the 14th Open International de Sants, Hostafrancs i La Bordeta in Barcelona edging out Aleksandr Rakhmanov, Emilio Cordova, Kevin Spraggett and Samuel Shankland on tiebreak score, after all players scored 8 points from 10 games.

[5] He also took part in the European Team Chess Championship in 2007, 2009, 2013 and 2015; Gajewski won the individual silver medal on board three in 2007.

[6] He was a second to Viswanathan Anand in the World Chess Championship 2014, held in Sochi, Russia, and has worked as his second during several events since then.

[7] A strong opening theoretician, Gajewski is probably most known in the chess world by the gambit move 10...d5!?

[9] He was also Gukesh's main trainer when he won the 2024 FIDE World Chess Championship against Ding Liren.