Izidor Gross (25-06-1866 - 1942) was a Croatian-Hungarian chessplayer, chess composer and writer

Izidor Gross was a chessplayer and writer. He was one of the founders of the Karlovac chess club and the organizer of the 1912 Karlovac chess tournament. He was the prolific author of books about chess and chess problems, among which "Karlovčkog međunarodnog šahovskog turnira god. 1912" (1913). In 1909 he wrote the first Croatian book on chess with the title "Šahovska abeceda" (Chess Alphabet). He composed direct mates, with some incursions in helpmates.