In the second half of 1950s, Veikko Hänninen was one of Finland's leading chess players. In Finnish Chess Championships he has won silver (1956) medal. In 1957, in Wageningen Veikko Hänninen participated in World Chess Championship Zonal tournament.
Veikko Hänninen was also known as a writer. His main work is The Fishing Line (Finnish: Siima soi, Gummerus 1978). The book tells about fishing (primarily northern pike fishing).