In 1925 he was the first to define and discuss the concept of strategy in game theory . Steinhaus published his second joint paper with Banach in 1927 Sur le principe de la condensation des singularités.
Sa 1925 ay siya ang unang upang tukuyin at talakayin ang konsepto ng diskarte sa game theory. Steinhaus-publish na ang kanyang ikalawang pinagsamang papel na may Banach sa 1,927 Sur le Principe de la paghalay des singularités.