He often used the Scandinavian Defense and greatly developed its theory in the early 1900s. The chess opening 1.d3 is named the Mieses Opening. He is also known for the Mieses Variation of the Vienna Game, which runs 1.e4 e5. 2.Nc3 Nf6 (or 2...Nc6) 3.g3. Its king bishop fianchetto can be seen as an early example of hypermodernism. There is also a line in the Scotch Game named The Mieses Variation (1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nxc6 bxc6 6.e5) after he employed it four times at Hastings 1895.p213