Tauromachie wrote on 08/05/18 at 20:55:20:


Yeah, I was a bit surprised about seeing this pop up. It's notable that GM's are still looking at the 9...c4 variation. I'm not expecting any earth shattering novelties. It would be nice to see Erwin l'Ami find some slightly improved endings for Black in this variation. That all said, I rarely get to play in the mainlines OTB. Most folks try various assortments of dxc5 lines or try to get b3 structures.

Looks like ChessBase released a new FritzTrainer on the Tarrasch Defence by GM Erwin I'Ami! Interestingly, the mainline he is choosing to drill into is the 9...c4 variation. The contents outline is below: 

01: Welcome [01:00]
02: Introduction [07:41]
03: The Right Exchange [16:21]
04: Structure vs Activity [16:51]
05: Changing the Pawn Structure [09:01]
06: The Squeeze [21:51]
07: The Exchange Sacrifice on e3 [10:43]
    
Chapter 2: 6.g3 and 9.Bg5
    01: 9.Bg5 c4 10.Ne5 Be6 11.b3 Qa5 - Video notation [15:19]
    02: 9.Bg5 c4 10.Ne5 Be6 11.b3 h6 12.Bxf6 Bxf6 13.Nxc6 bxc6 14.Na4/Rc1 - Video notation [14:15]
    03: 9.Bg5 c4 10.Ne5 Be6 11.b3 h6 12.Bxf6 Bxf6 13.Nxc6 bxc6 14.bxc4 dxc4 15.e3 Qa5/Rc8 - Video notation [14:52]
    04: 9.Bg5 c4 10.Ne5 Be6 11.b3 h6 12.Bxf6 Bxf6 13.Nxc6 bxc6 14.bxc4 dxc4 15.e3 c5 - Video notation [17:12]
    05: 9.Bg5 c4 10.Ne5 Be6 11.Nxc6 - Video notation [01:25]
    06: 9.Bg5 c4 10.Ne5 Be6 11.e3 h6 12.Bxf6 Bxf6 13.f4 Ne7 - Video notation [09:01]
    07: 9.Bg5 c4 10.Ne5 Be6 11.e3 h6 12.Bxf6 Bxf6 13.f4 Bxe5 - Video notation [06:24]
    08: 9.Bg5 c4 10.Ne5 Be6 11.f4 - Video notation [10:05]
    
Chapter 3: 6.g3 and 9.dxc5
    01: 9.dxc5 Bxc5 10.Na4 Be7 11.Be3 Bg4 12.h3/Bc5/Nc5 - Video notation [08:26]
    02: 9.dxc5 Bxc5 10.Na4 Be7 11.Be3 Bg4 12.Rc1 - Video notation [07:09]
    03: 9.dxc5 Bxc5 10.Bg5 d4 11.Bxf6 - Timman variation - Video notation [07:19]
    04: 9.dxc5 Bxc5 10.Bg5 d4 11.Ne4 - Video notation [12:17]
    05: 9.dxc5 Bxc5 10.a3/b3 - Video notation [17:00]
    06: 9.dxc5 Bxc5 10.Bf4 - Video notation [05:07]
    07: 9.b3/Be3/e3/Bf4 - Video notation [12:40]
    
Chapter 4: 6.dxc5
    01: 6...d4 7.Na4 Bxc5 8.Nxc5 Qa5 9.Bd2 Qc5 10.Rc1 - Video notation [10:27]
    02: 6...d4 7.Na4 Bxc5 8.Nxc5 Qa5 9.Bd2 Qc5 10.b4 - Video notation [06:25]
    03: 6...d4 7.Na4 Bxc5 8.Nxc5 Qa5 9.Qd2 Qc5 10.e3 - Video notation [07:40]
    04: 6...d4 7.Na4 Bxc5 8.Nxc5 Qa5 9.Qd2 Qc5 10.a3 - Video notation [09:53]
    05: 5.dxc5 - Video notation [08:19]
    
Chapter 5: Other Lines and Theoretical Overview
    01: 4.cxd5 exd5 5.Nf3 Nc6 6.Bf4 - Video notation [04:34]
    02: 4.cxd5 exd5 5.e4 - Video notation [08:44]
    03: 3.Nf3 c5 4.cxd5 exd5 5.Bg5 and 5.Nc3 Nc6 6.Bg5 - Video notation [14:10]
    04: 3.Nf3 c5 4.cxd5 exd5 5.g3 Nc6 6.Bg2 Nf6 7.0-0 Be7 8.dxc5 Bxc5 9.a3/Bg5 - Video notation [09:04]
    05: 3.Nf3 c5 4.cxd5 exd5 5.g3 Nc6 6.Bg2 Nf6 7.0-0 Be7 8.dxc5 Bxc5 9.Qc2 - Video notation [06:47]
    06: 3.Nf3 c5 4.cxd5 exd5 5.Nc3 Nc6 6.e3 - Video notation [09:35]
    07: 3.Nc3 c5 4.e3 - Video notation [08:59]
    08: Theoretical Overview [08:11]
    
Chapter 6: Games
    01: Taimanov,M - Spassky,B [09:39]
    02: Petrosian,T - Spassky,B [13:53]
    03: Tal,M - Keres,P [07:15]
    04: Polugaevsky,L - Pfleger,H [09:46]
    05: Forgacs,L - Tarrasch,S [10:58]
    
Chapter 7: Test section
    01: Test 1 - Koneru,H - Zhukova,N [01:06]
    02: Test 2 - Mory,E - Efimov,I [02:27]
    03: Test 3 - Onischuk,A - Graf,A [02:11]
    04: Test 4 - Zhao,X - Petrosian,T [02:22]
    05: Test 5 - Berkes,F - Petrosian,T [01:32]
    06: Test 6 - Schussler,H - Petursson,M [01:59]
    07: Test 7 - Kagramanianz,V - Vysochin,S [01:39]
    08: Test 8 - Andersson,U - Ricardi,P [02:23]
    09: Test 9 - Tadic,B - Dobrev,N [01:48]
    10: Test 10 - Antic,D - Kotronias,V [02:25]
    11: Outro [01:45]