Viacheslav Ragozin (1908-1962) was a Soviet grandmaster (1950). In 1944 Ragozin trained with Botvinnik for the USSR Championship. They trained with a radio going full blast in the room to get accustom to a possibly noisy tournament hall. Ragozin ended up in 14th place out of 17 and blamed his results on the unusual quietness of the tournament hall! Ragozin was Botvinnik’s second in the 1948 world championship tournament and in the 1951 world championship match. He was also a correspondence chess grandmaster, winning the 2nd world correspondence chess championship (1956-1959). Professionally, he was a building engineer. The Ragozin variation is 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Bb4.