Ľudovít Lačný (08.12.1926 - 25.12.2019)

Slovak chess composer and International Master of the FIDE for Chess composition

Ľudovít Lačný was best known as the inventor of the Lacny cycle. He was the first chess composer to demonstrate it in 1949:
In one phase of play, the Black defenses a, b and c are answered by the White mates A, B and C respectively; in another phase, those same defenses a, b and c are answered by the White mates B, C and A respectively.

Source: chesscomposers.blogspot.com