Karlsbad 1929 brings together leading masters of the era. In round sixteen, Milan Vidmar, who combined his chess career with work in electrical engineering, has White against Max Euwe. His opponent would become world champion six years later.
After 33...Qf4, Black threatens mate on h2. Vidmar answers with a series of checks: 34.Re8+ Bf8 35.Rxf8+ Kxf8 36.Nf5+. The knight opens the queen’s a3–f8 diagonal, giving White a mating attack. Euwe resigns here. The defence 36...Qd6 is met by 37.Qxd6+, continuing the attack. The game score ends with the knight move.