Stigma wrote on 05/14/24 at 13:34:07:
Does anyone know what this book gives against the Nf3/e3 main line?
Quote:Yap writes:
I am rejecting the big main line, 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6, where thousands of games have been played, especially at elite GM level. I offer a quirkier system that is little explored, as we shall see.
- Game 21 V.Shinkevich - Yu Yangyi / World Rapid Ch, St. Petersburg 2018
1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 a6 5.Bxc4 e6 6.a4 b6!? - Game 22 B.Lajthajm - M.Perunovi (sic) / Bar 2005
same as Game 21 - Game 23 G.Kallai - Y.Balashov / European Cup, Moscow 1991
1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 a6 5.Bxc4 e6 6.O-O Nbd7 7.a4 c5 - Game 24 Y.Dzhumagaliev - N.T.S.Nguyen / World Rapic Ch, Riyadh 2017
1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 a6 5.Bxc4 e6 6.O-O Nbd7 7.Qe2 b5 - Game 25 A.Istratescu - P.Acs / Hungarian League 2007
1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 a6 5.Bxc4 e6 6.Qc2
I was quite concerned by the notes to Game 25 at 6.Qc2.
Quote:Yap writes:
We'll now wrap up our coverage of the 4.e3 main line with a few lesser sixth move options for White. (a) 6.Qe2 Nbd7 will most likely transpose to the main line, whether or not White plays a2-a4. For instance, 7.O-O is the previous game, while 7.a4 c5 8.O-O goes back to Game 23. (b) 6.Bb3 is prophylaxis against 6...b5 but will most likely transpose anyway; (*) (b1) 7.Nc3 ... (b2) 7.a4 ...
Edited: Removed my editorializing at (*). I wrote "(e.g. black plays 6...b5?! despite the prophylaxis)". Note that Yap omits black's sixth move (or at least I read it that way), but variations (b1) and (b2) make it clear that black does indeed play 6...b5.
To my eye 6.Qe2 (especially) and 6.Bb3 both look like challenging ideas against black's quirkiness.