Alik Gershon, 30,  a chess grandmaster, has broken the world record for simultaneous chess games after a 19-hour marathon match against 523 players.

(He won 454, lost 11 and drew 58 and so took the record from the  former, grandmaster Morteza Mahjoob. 
Mr Mahjoob last year bested 397 out of 500 chess players in Tehran.  How do they do it?  I can’t even keep the moves of 1 game in my head!)