is most often played. Against it are aggressive lines such as the Bayonet Attack (4.Nc3 e6 5.g4), a popular line in the 1980s and later favoured by Latvian Grandmaster Alexei Shirov. A more natural development 4.Nf3 e6 5.Be2 c5 6.Be3 was popularised by English Grandmaster Nigel Short and often seen in the 1990s.