The Najdorf Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 for Black repertoire. In the main line 6.Bg5 e6 7.f4 author analyzes 7..Be7. The line 6.Bc4 e6 7.Bb3 is met by 7..Nc6. Most other variations like 6.Be2, 6.Be3, 6.h3, 6.g3, 6.f4 and 6.a4 are answered by 6..e5. IM David Vigorito is a renowned author and works also as a coach. He writes in the foreword: I have been playing the Najdorf for about twenty-five years and teaching it for about a decade. Further information about the book is available at qualitychess.co.uk. 2 pictures.