At the conclusion of the sixth round of the elite London Chess Classic tournament (on Thursday), which opened on December 9 and ends today, US grandmaster Wesley So maintained the lead in a field which boasts eight of the world’s top ten chess players. He captured three vital wins against his countryman Hikaru Nakamura, England’s Michael Adams and Bulgaria’s Veselin Topalov, being the only participant to achieve such a feat. Such feats are unusual in high-level chess, even for the world champion, the world’s most gifted chess player.