Four of the best chess players of the current season –the Armenian olympic champion Levon Aronián; the French Maxime Vachier-Lagrave; the Azeri Shakhriyar Mamedyarov; and the Brit Michael Adams will be the contendants at the sixth Grand Slam Chess Masters final, one of the most prestigious tournaments of the world, that will be held next week, at Bilbao, from the 7th to the 12th of October.