Garech: Here is the analysis I've done today in the line:
1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.g3 Bb4+ 5.Bd2 Be7 6.Bg2 c6 7.O-O O-O 8.Qc2 b6 9.Rd1 Nbd7 10.Bf4 Ba6 11.Nbd2 Rc8 12.Rac1 h6
As always, lines given in brackets are weaker alternatives according to Stockfish. They are not sandpapered.
I have followed the moves given as best play.
1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.g3 Bb4+ 5.Bd2 Be7 6.Bg2 c6 7.O-O O-O 8.Qc2 b6 9.Rd1 Nbd7 10.Bf4 Ba6 11.Nbd2 Rc8 12.Rac1 h6
13.e3 g5 14.Be5 g4 15.Bxf6 Bxf6 16.Ne1 Bb7 17.Nd3 c5 18.cxd5 cxd4 19.Qa4 exd5 20.Nb3 dxe3 21.Qxg4+ Bg5 22.Rxc8 Qxc8 23.fxe3 Stockfish 1 6 JA : +0.12. Depth: 18. ♘odes: 218.4 M
(13.e4 g5 14.Be3 Ng4 15.Bh3 Nxe3 16.fxe3 h5 17.exd5 cxd5 18.Bxe6 fxe6 19.Qg6+ Kh8 20.Qh6+ Kg8 21.Qg6+ Stockfish 1 6 JA : 0. Depth: 18. ♘odes: 217.1 M
(13.a3 g5 14.Be3 Ng4 15.Bh3 Nxe3 16.fxe3 Bb7 17.Bxe6 fxe6 18.Qg6+ Kh8 19.Qxh6+ Kg8 20.Qg6+ Kh8 21.Qh6+ Kg8 Stockfish 1 6 JA : 0. Depth: 18. ♘odes: 217.6 M)
13...c5 14.Qa4 Bb7 15.Ne5 Nxe5 16.Bxe5 Bc6 17.Qa6 Nd7 18.cxd5 exd5 19.e4 Nxe5 20.exd5 Bb7 21.Qxb7 Rc7 22.Qa6 cxd4 23.Nf3 Rxc1 24.Rxc1 Qxd5 25.Nxe5 Qxe5 26.Qxa7 d3 27.Qxb6 d2 28.Rd1 Stockfish 1 6 JA : +0.12. Depth: 16. ♘odes: 129.4 M
(13...g5 14.Be5 g4 15.Bxf6 Bxf6 16.Ne1 Re8 17.Qb3 b5 18.Qa3 Qb6 19.b3 Bb7 20.Qd6 Red8 21.Qf4 h5 22.Nd3 bxc4 23.bxc4 Be7 Stockfish 1 6 JA : +0.16. Depth: 16. ♘odes: 129.9 M)
(13...Bb7 14.cxd5 Nxd5 15.Nc4 c5 16.Nd6 Bxd6 17.Bxd6 cxd4 18.Qa4 Rxc1 19.Rxc1 Nc5 20.Bxc5 bxc5 21.exd4 Nb6 22.Qxa7 Bxf3 23.Bxf3 cxd4 24.Be4 f5 25.Bd3 Stockfish 1 6 JA : +0.20. Depth: 16. ♘odes: 131.2 M)
14.dxc5 (easily best) g5 15.Be5 g4 16.Bxf6 Bxf6 17.Nd4 Rxc5 18.b4 Rc7 19.Qa4 Qc8 20.b5 Bb7 21.Qa3 Nc5 22.cxd5 Bxd5 23.Bxd5 exd5 24.Qc3 Re8 Stockfish 1 6 JA : +0.20. Depth: 18. ♘odes: 461.2 M
14...Bxc4 15.Nxc4 Rxc5 16.Qe2 dxc4 17.e4 Qc8 18.Be3 Rc7 19.Nd4 Rc5 20.Nf3 Stockfish 1 6 JA : 0. Depth: 19. ♘odes: 656.1 M
(14...g5 15.Be5 g4 16.Bxf6 Bxf6 17.Ne1 Rxc5 18.Nd3 Rc7 19.Qb3 dxc4 20.Nxc4 Bg7 21.Qa4 Bxc4 22.Rxc4 Rxc4 23.Qxc4 Ne5 24.Qc2 Qc8 25.Qa4 b5 26.Qb3 Qc4 27.Qxc4 bxc4 28.Nc5 Nd3 29.Nxd3 cxd3 30.Rxd3 Bxb2 Stockfish 1 6 JA : +0.28. Depth: 19. ♘odes: 657 M – worth looking at)
15.Nxc4 Rxc5 16.Qe2 dxc4 17.e4 Qc8 18.Be3 Rc7 19.Bf4 Rc5 Stockfish 1 6 JA : 0. Depth: 17. ♘odes: 134.6 M only line worth considering
15…Rxc5 forced
16.b3!? b5 17.Qb1 bxc4 18.bxc4 g5 19.cxd5 gxf4 20.Rxc5 Nxc5 21.dxe6 Qb6 22.exf7+ Kg7 23.exf4 Qxb1 24.Rxb1 Rd8 25.Ne5 Rd2 26.Rb8 Bf8 27.Bf1 Nce4 28.f3 Nc3 29.Bc4 Nd7 Stockfish 1 6 JA : +0.08. Depth: 17. ♘odes: 108.4 M
16...Qe8 17.e4 dxc4 18.bxc4 e5 19.Bd2 Rc7 20.Bh3 Bd6 21.Bc3 Qe7 22.Qd3 Ba3 23.Rc2 Bb4 24.Bxb4 Qxb4 25.a3 Qc5 26.Re2 Rd8 27.Red2 Stockfish 1 6 JA : +0.20. Depth: 19. ♘odes: 246.7 M
(16...b5 17.Qb1 bxc4 18.bxc4 g5 19.cxd5 gxf4 20.Rxc5 Nxc5 21.dxe6 Qb6 22.exf7+ Kg7 23.Qxb6 axb6 24.gxf4 Nce4 25.Rc1 Ra8 26.Rc2 Bc5 27.Ne5 Ra4 28.Bf3 Kf8 29.Kg2 Nd5 Stockfish 1 6 JA : +0.28. Depth: 19. ♘odes: 248.1 M)
(16...g5 17.Be5 dxc4 18.bxc4 g4 19.Bxf6 Bxf6 20.Nd4 h5 21.Qa4 Ra5 22.Qc2 Bxd4 23.exd4 Qg5 24.a4 Rd8 25.Re1 Nf6 26.Rcd1 h4 27.Re3 Rc8 28.gxh4 Qxh4 29.Bb7 Rc7 Stockfish 1 6 JA : +0.32. Depth: 19. ♘odes: 249.6 M)
after 16…Qe8, 17.Qe2 looks too good to allow…! 17…bxc4 is forced, and now comes 18.b4 Rc8 with a good edge to white: