Mariánské Lázně
Foltys had his best tournament result at Karlovy Vary / Mariánské Lázně in 1948. In the same year, he took 3rd in Budapest. In 1949, he tied for 1st with Stojan Puc in Vienna (3rd Schlechter Memorial), tied for 4-7th in Venice, and took 6th in Trenčianske Teplice. In 1950, he took 7th in Szczawno Zdrój. In 1950, he took 13th in Amsterdam. He qualified in Mariánské Lázně in 1951 for the Interzonal of Stockholm 1952, but died of leukaemia at Ostrava in 1952 before it took place.