Schandorff's new line against the Noteboom

Schandorff suggests the new line with 13 c5 against the Noteboom in his excellent work Playing 1.d4 The Queen's Gambit (2012).  Below is his analysis of this line, plus a few of my own comments interspersed.

(2) Noteboom - Schandorff's 13 c5!? [D31]

15.09.2012

[Bill]

1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.a4 Bb4 6.e3 b5 7.Bd2 a5 8.axb5 Bxc3 9.Bxc3 cxb5 10.b3 Bb7 11.bxc4 b4 12.Bb2 Nf6 13.c5!?

Diagram

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6-+-+psn-+&
5zp-zP-+-+-%
4-zp-zP-+-+$
3+-+-zPN+-#
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1tR-+QmKL+R!
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This is Schandorff's new idea. A positional approach, he hopes to route the bishop to blockade the a4 square in two moves via b5-a4 instead of three moves via d3-c2-a4. If White can succesfully thwart Black's counterplay, he can later turn his attention to the center eventually expanding with f3 and e4 with advantage. [13.Bd3 0–0 14.0–0 Nbd7 15.c5 according to Schandorff, Dreev has tried this strategy in his games. 15...Bc6 16.Bc2 Qc7 17.Ba4 Thus, the genesis of Schandorff's concept. White can potentially get positions like this, but being on move. Not much, but it's something.] 13...0–0 14.Bb5 Bc6 [14...Qc7 15.0–0 Bd5 (15...Ng4 16.g3) 16.Qe2 Nc6 17.Rfc1 Ne4 18.Ne1 good for White per Scherbakov. He wrote a book for Black on the Triangle System (and noteboom) which I don't have.; Note White in these lines plays Rfc1 and Qe2 in the first phase. 14...Qd5 15.0–0 Nc6 16.Qe2 Ne7 17.Rfc1 Rfc8 18.Qf1 Bc6 19.Ne5 Bxb5 20.Qxb5 Rcb8 21.Qa4 Qe4 22.Qb3 Nf5 23.Re1 Qh4 24.e4 Ne7 25.g3 Qh3 26.f3 J. Johansson-Gunajew, Olomouc 2011; 14...Nc6 15.0–0 Qd5 transposes to 14...Qd5] 15.Ba4 Bxa4 [15...Qc7 16.0–0 Nbd7 this would be the same position as in the note to move 13 but with White on move. This hardly looks like the end of the world for Black, but nevertheless is what White is aiming for.] 16.Qxa4 Qd5 [16...Qc7 17.0–0 Nc6 18.Nd2 Nd5 19.Nc4 f5 20.Nd6 Rf6 analysis by Scherbakov with evaluation unclear. Schandorff continues 21.Rfe1 Rd8 22.e4 fxe4 23.Rxe4 Rdf8 24.f3 good for white according to Schandorff] 17.0–0 Nc6 18.Rfd1 Ne4 a mistake since White drives Black back anyway, gaining time [18...Rfc8 19.Nd2 Ne4 20.Nf1 f5 (20...e5 suggested as a better try for black) 21.f3 Nf6 22.Nd2 with a slight advantage for White] 19.Ne1 1 Blockade those pawns 2 Prevent / anticipate Blacks ...e5 break 3 Drive black backward and prepare f3/e4 4 keep in mind the knight maneuver Nd2/c4/d6 (offensive) and Ne1/d3 or Nd2/f1 (defensive) 5 Never play Bxc6 as you need to keep the a4 blockade 19...f5 20.Nd3 Qd7 21.f3 [21.d5! is tactically superior as Schandorff points out 21...exd5 22.f3 Ng5 (22...Nf6 23.Bxf6 gxf6 24.Nf4) 23.Nf4 Qe8 24.Nxd5 Ra7 25.Rd3] 21...Nf6 22.Nf2 Nd5 23.Rd3 Rad8 24.Nh3 Nf6 25.Rad1 Kh8 26.Qb3 Qe8 27.Re1 h6 28.Rdd1 Ra8 29.Qa4 Ne7 30.Ra1 Qxa4 31.Rxa4 Rfd8 32.Nf4 Ra6 33.Rea1 Rda8 34.Nd3 Nc6 35.Kf2 Kg8 36.Ke2 Kf7 37.Kd2 R6a7 38.Kc2 Rb8 39.Kb3 g5 40.Re1 Rd7 41.Kc4 Ke7 42.e4 fxe4 43.fxe4 Kf7 44.Rf1 Kg6 45.Rxf6+ Kxf6 46.d5+ Ke7 47.dxc6 Ra7 48.Be5 Black resigns. Lomineishvili-Melnikova Dresden 2004 Line