World number one Magnus Carlsen of Norway has cracked all-time high ratings, defeating Luke McShane of England in the first round of the London Chess Classic tournament. The rating for Carlsen stood at 2851.2 points in the unofficial live rating portals. It means the Norwegian has cracked the all-time high rating record of 2851 held by former world champion and his former trainer Gary Kasparov of Russia. On the first day of the competition Saturday night, all the four games in the nine-players round robin tournament ended decisively. The biggest upset was recorded by HikaruNakamura of United States who defeated World number two Levon Aronian with black pieces. Vladimir Kramnik turned out to be another winner of the day at the expense of world's top woman player Judit Polgar of Hungary. The all-decisive-games record was kept intact by a late-benefitting Michael Adams of England against compatriot Gawain Jones. World champion Vishwanathan Anand had a rest day in the opener as he drew number in the official drawing of lots. Anand got a favourable draw and will start his campaign at the London Classic from round two on Sunday.