What is the name of this variation:
[FEN ""] 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 Nbd7
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It's an old main line of Sicilian Najdorf, and according to Wikipedia, it's the De Verbeterde List, or Improved Strategem, due to recent efforts by Dutch players to revive it.