One of the greatest rivalries in the history of chess is due to resume today as Garry Kasparov takes on Anatoly Karpov in the Spanish city of Valencia.

The 12-game rematch takes place 25 years after the two chess legends first competed for the world title. That epic, gruelling encounter lasted five months in Moscow before being called off without a clear winner. Kasparov went on to snatch the world crown from Karpov in 1985 and defended his title the year after.

The five-day match in Valencia will be played under strict time limits and will be broadcast live on Valencia's regional government website (www.gva.es).

Kasparov (46) is considered by many the best player in chess history. He was the youngest champion at 22 and dominated the game for two decades. He retired from the top-level in 2005.