[1] Lehen studied at the University of Arts, Bratislava between 1949 and 1955 under the professors D. Milly, V. Hložník.

Ultimately, he was charged in a show trial typical of communist Czechoslovakia, and from 1962 he spent 6 years behind bars at Leopoldov Prison.

He has gained distinctions including the first prizes in many chess composition tourneys, often in coauthorship with IM Juraj Brabec.

This composing duo pioneered many complex themes in fairy twomovers, working usually in a way Brabec proposing the scheme and Lehen developing it in the artistically satisfactory manner.

His art centred on the female figure, sometimes as a daughter and sometimes as Venus or a girl in traditional clothing.