Here is a copy of the Chessbase Forum Post, if anyone is interested:
Quote - I don't often comment here, but I have observed a disturbing trend especially with your Opening Repertoire DVD's, namely inexplicable omissions of important lines related to the recommended repertoire. In this latest offering Pruijssers & Zwirs somehow fail to consider a big mainline in their repertoire against the Dragon, namely:
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 0-0 8.Qd2 Nc6 9.0-0-0 d5 10.exd5 Nxd5 11.Nxc6 bxc6 12.Bd4 Bxd4 13.Qxd4 Qb6 14.Na4 Now they only consider 14...Qc7 and forget completely to look at the equally important 14...Qa5!? This is a very very strange oversight, and I hope it's not indicative of the thoroughness in which they treat the other Sicilian systems. I am growing weary of these Opening Repertoires promising to be complete but always missing obvious and important lines. Jan Werle was guilty of the same thing in his 3 part Sicilian effort, offering the following: 1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 4.Bxd7+ Nxd7 5.0-0 Ngf6 6.Re1 e6 7.c3 Be7 8.d4 0-0 9.e5 and now only considers 9... dxe5 10.dxe5 Nd5 when 9...Ne8!? is well tested and known to be theoretically dead equal for more than 3 decades see Szmetan vs Tal. Then there is Danny King's recent King's Gambit DVD in which he made the Quaade-gambit the cornerstone of his Repertoire, but fails to consider one of it's most critical lines: 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Nc3 Nc6! intending 5.d4 g4 6.Bc4 gxf3 7.0-0 Nxd4! intending 8.Qxd4 Qg5 winning. This whole sequence is well known to modern theory, and a major reason why we rarely see the Quaade in tournament chess. I brought this to his attention on You Tube but only after pointing out yet another important omission did he respond to say that he would fix it in a follow up Kings gambit Toolbox DVD for Chessbase, in the meantime he continues to do his promo tour on Youtube with Power Play 27 The Kings Gambit episode 5, when I would have thought that fixing these omissions should be taking priority.
This brings me to my final thought, does Chessbase not Beta Test these Opening DVD's to catch such omissions and hand them back to the authors to fix before releasing to the consumer. This lack of oversight is encouraging presenters to turn in shoddy work, and it is becoming the norm rather than the exception, in general I like Chessbase products so take my complaints seriously and as an opportunity to get things right in the future or risk losing a loyal customer.
https://en.chessbase.com/post/pruijssers-zwirs-how-to-slay-the-sicilian-vol-1-3-... Sincerely yours,
Concerned Consumer - End Quote