Magnus Carlsen is a Norwegian Grandmaster born in 1990. At age 14 he became the second youngest Grandmaster ever and in 2005 was the youngest player to attend the candidates tournament.
Despite his young age he already won several super tournaments, including Corus 2008 and in 2009 winning the 21st Pearl Spring Chess Tournament with a score of 8/10 and a tournament performance of over 3000 Elo.
He was coached by Garry Kasparov in 2009 and is by far the youngest player ever to have an rating of 2800.
He currently is the highest rated player on the July 2011 list of FIDE with a rating of 2821.
Alexei Shirov is a Spanish Grandmaster, born 1972 in Latvia. He became the World Under 16 Champion in 1988 and achieved the Grandmaster title with 20 years.
In 1998 he defeated Kramnik in a 10 match game to gain the right to challenge reigning champion Garry Kasparov, yet funding of the match eventually fell through.
His peak rating was 2755.
This game was played in last round of the Tal Memorial 2009. Carlsen needed a draw to secure first place. Carlsen played a very sharp line, a brave choice that however backfired. Obtaining a strong attack, Shirov was able to defend accurately and Carlsen is left in a hopeless position.