[1] He studied Spanish during the time he was based in Spain, playing in the chess league.

[1] Carlsson has represented his country since his school years and is now a member of the senior national team.

His performance stagnated from mid-2001 to mid-2005[3] due to losing small amounts of rating points in successive tournaments during that period.

His performance rating was 2686, having faced strong opposition, including Dmitry Jakovenko and Mark Hebden.

[1] He earned his first GM norm at the 2005 European Team Championship,[6] his second at the Open de Tarragona (Spain),[7] the third at the Torneig Internacional Ciutat de Sóller, and the fourth in the 3rd round at the European Club Cup.