Alekhine were the next to significantly further the record. 20th century history In 1924, at the Alamac Hotel of New York, Alekhine played 26 simultaneous blindfold games against very strong opponents (Isaac Kashdan and Hermann Steiner among them), with the score of 16 wins, 5 losses, and 5 draws. This was probably the strongest of any blindfold exhibitions ever held. The next year in February in Paris he faced 28 teams of four players each, with the impressive result of 22 wins, 3 losses, and 3 draws. In the same year, Réti bettered this record by playing 29 players simultaneously in São Paulo, and commented on his poor memory after leaving his briefcase behind after the event. On July 16, 1934, in Chicago, Alekhine set the new world record by playing 32 blindfold games, with 19 wins, 4 losses, and 9 draws. Edward Lasker was the referee for this event. The generally acknowledged world record that stood for the rest of the 20th century was set by George Koltanowski on 20 September 1937, in Edinburgh, who played 34 chess games simultaneously while blindfolded. He won 24 games and lost 10 over a period of 13 hours. The record was included in the Guinness Book of Records. Later, both Miguel Najdorf and János Flesch claimed to have broken that record, but their efforts were not properly monitored the way that Koltanowski's was. Najdorf's first record in Rosario, Argentina was against 40 opponents, scoring 36 wins, 1 draw, and 3 losses. and was organised in an effort to gain sufficient publicity to communicate to his family that he was still alive, as he had remained in Argentina after travelling from his native Poland to compete in the 1939 Chess Olympiad, during which German Invasion of Poland occurred. He increased this record to 45 opponents in São Paulo in 1947, with the result of 39 wins, 4 draws, and 2 losses. The Guinness Book of Records does not acknowledge Najdorf's record, because he allegedly had access to the scoresheets, and there were multiple opponents per board. Koltanowski claimed that he could have managed 100 games under those conditions. However, Najdorf's record is considered legitimate by other sources. Hungarian Janos Flesch claimed to have bettered this record in Budapest in 1960, playing 52 opponents with 31 wins, 3 draws, and 18 losses. However, this record attempt was somewhat sullied by the fact that Flesch