Austrian chess problemist, né Erlinger, pseudonym D. Nirle who published 1600 problems in three or more moves in old German style which 250 were honored.

He was also a precursor of the Bohemian school.

"Konrad Erlinger published problems under the pseudonym of Konrad Erlin. He was a prolific chess composer, a lover of model mates and of sacrifices of white pieces, and a precursor of the Bohemian school."

Source: https://chesscomposers.blogspot.com/2012/02/february-10th.html