1. d2d4  1... d7d5  2. c2c4  2... c7c6  3. g1f3  3... g8f6  4. e2e3  4... g7g6 This variation is named after Carl Schlechter, a player who almost became the world champion and drew the most mysterious match in chess history, against Emanuel Lasker in 1910. 5. b1c3  5... f8g7 