Who holds the record for the most "blindfold" chess games in a single tournament?

The world record for blindfold chess has been broken by Timur Gareyev, a 28-year-old US grandmaster. He played 48 games simultaneously in Las Vegas in December, scoring 80%, wearing an actual blindfold and taking 23 hours, all the while on an exercise bike on which he rode the equivalent of 50 miles. For decades Miguel Najdorf's 45 games at São Paulo in 1947 stood as the record. Najdorf had stayed in Buenos Aires when war broke out during the 1939 Olympiad and took up blindfold displays in the hope that news of his achievements would reach his relatives in Poland, who had actually perished in concentration camps.