During the 2010's, the hitherto forgotten line 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Nc3 c5 5.cxd5 exd5 6.g3 Nc6 7.Bg2 cxd4 8.Nxd4 Bc5 became a topic of theoretical debate at the top level mainly due to the efforts of Russian grandmaster Daniil Dubov. This approach to the Tarrasch Defense is therefore known as the Dubov Tarrasch. Swedish Variation The Swedish Variation (also called the Folkestone Variation) is a line beginning 6... c4. Black now has a four to three pawn , and will try to expand with ...b5, with White aiming for a central break with e4. The line is considered somewhat dubious and is rarely seen in modern practice. The Swedish Variation has ECO code D33. See also List of chess openings List of chess openings named after people Semi-Tarrasch Defense References Chess openings