His short reign atop the chess world made him one of the two so-called `` winter kings '' who interrupted Botvinnik 's long reign from 1948 to 1963 ( the other was Smyslov , world champion 1957-58 ) .
Tal 's short reign atop the chess world made him one of the two so-called ` winter kings ' who interrupted Botvinnik 's long reign from 1948 to 1963 ( the other was Smyslov , world champion 1957-1958 ) .