Anand vs Topalov Game 7

[AdminX]

Anand,V - Topalov,V, World Chess Championship 2010
[d]4rbk1/2R2ppp/8/1q6/2p5/2Bp1PP1/1P5P/1N3Q1K b - - 0 1

Analysis by Stockfish 1.7.1-16 JA 64bit:

23...Bd6 24.Ra7 Re2 25.Ra8+ Bf8 26.Nd2 Qh5 27.h3 Qc5 28.Ne4 Qc6 29.Ra1 Qc8 30.Re1 Rc2
+/- (0.96 ++) Depth: 6 00:00:00 3kN
+/- (1.13) Depth: 14 00:00:00 208kN

23...Re2 24.Nd2 Qh5 25.h4 Qb5 26.Rc8 Qa6 27.Rd8 Qb6 28.Ra8 Qc6 29.Ra1 Bc5 30.Ne4 Bb6 31.Re1 f5 32.Rxe2 dxe2 33.Qxe2 fxe4 34.Qxe4 Qc5 35.Kg2
+/- (1.09) Depth: 14 00:00:00 227kN
+/- (1.17 --) Depth: 18 00:00:00 1342kN

23...Bc5 24.Nd2 Qb6 25.Be5 Rxe5 26.Rc8+ Bf8 27.Nxc4 Qe6 28.Rxf8+ Kxf8 29.Nxe5 Qxe5 30.Qxd3 Ke7 31.Qd2 Qd6 32.Qe3+ Qe6 33.Qa7+ Qd7 34.Qa3+ Qd6 35.Qc3 Qd1+ 36.Kg2 Qe2+ 37.Kh3 g6 38.Qb4+ Kf6 39.Qd4+ Qe5 40.Qb6+ Ke7 41.Kg2 Kd7 42.Kf2 Qd5 43.Qb4 g5 44.b3 h5 45.Ke3 Qe6+ 46.Kd3 Qf5+ 47.Qe4 Qb5+ 48.Qc4 Qf5+ 49.Ke3
+/- (1.09) Depth: 18 00:00:00 2153kN
+/- (1.09) Depth: 26 00:00:17 66572kN

23...Bd6 24.Ra7 h6 25.Qh3 Qg5 26.Nd2 Re1+ 27.Nf1 d2 28.Ra8+ Bf8 29.Rxf8+ Kxf8 30.Qc8+ Ke7 31.Qc7+ Ke8 32.Qc6+ Kf8 33.Qa8+ Ke7 34.Qa7+ Ke8 35.Qa4+ Kd8 36.Ba5+ Ke7 37.Qb4+ Ke6 38.Qb6+ Kd5 39.Bb4 Rxf1+ 40.Kg2 c3 41.Qc5+ Ke6 42.Qd6+ Kf5 43.g4+
+/- (1.01 ++) Depth: 26 00:00:24 92781kN
+/- (1.09 --) Depth: 27 00:01:32 332mN

[AdminX]

Anand must be singing that song called "How you like me now!"

[AdminX]

[d]4r1k1/R4ppp/3b4/1q6/2p5/2Bp1PP1/1P5P/1N3Q1K b - - 0 24

"Bobby, what you gonna do now?"

Reply: "Whatever I do, It's got's to be funky!"

[Sven]

Analysis by Stockfish 1.7.1-16 JA 64bit:
[...]
23...Bc5 24.Nd2 Qb6 25.Be5 Rxe5 26.Rc8+ Bf8 27.Nxc4 Qe6 28.Rxf8+ Kxf8 29.Nxe5 Qxe5 30.Qxd3 Ke7 31.Qd2 Qd6 32.Qe3+ Qe6 33.Qa7+ Qd7 34.Qa3+ Qd6 35.Qc3 Qd1+ 36.Kg2 Qe2+ 37.Kh3 g6 38.Qb4+ Kf6 39.Qd4+ Qe5 40.Qb6+ Ke7 41.Kg2 Kd7 42.Kf2 Qd5 43.Qb4 g5 44.b3 h5 45.Ke3 Qe6+ 46.Kd3 Qf5+ 47.Qe4 Qb5+ 48.Qc4 Qf5+ 49.Ke3
+/- (1.09) Depth: 18 00:00:00 2153kN
+/- (1.09) Depth: 26 00:00:17 66572kN

In that analysis, as in the previous one for Rc7, SF seems to have missed that after 30...Ke7? white has a simple win by exchanging queens with 31.Qe4. I do not say that the queen ending itself is not won (I don't know) but humans would immediately choose the +1 pawn ending.

Nevertheless, the search depth for the queen ending looks very impressive.

In the meantime Topalov has played Bd6 instead of Bc5 so the analyis above is "history" now.

Sven

[AdminX]

Anand,V - Topalov,V, World Chess Championship 2010
[d]4r1k1/R4ppp/3b4/1q6/2p5/2Bp1PP1/1P5P/1N3Q1K b - - 0 1

Analysis by Stockfish 1.7.1-16 JA 64bit:

24...Re2 25.Nd2 Qh5 26.h3 Qb5 27.Ra1 Qe8 28.Ne4 Bc7 29.Re1 f5 30.Rxe2 dxe2 31.Qxe2 fxe4 32.fxe4 Bxg3 33.Kg2 Qg6 34.Qxc4+ Kf8 35.Qc8+ Ke7 36.Qg4
+/- (1.21) Depth: 6 00:00:00 6kN
+/- (1.37) Depth: 13 00:00:02 347kN

24...h6 25.Qh3 Bb4 26.Qd7 Qxd7 27.Rxd7 Re2 28.Bxb4 Rxb2 29.Nd2 Rxb4 30.Rd4 Ra4 31.Nxc4 Kh7 32.Rf4 Ra2 33.Rxf7 d2 34.Nxd2 Rxd2
+/- (1.21) Depth: 13 00:00:02 394kN
+/- (1.09 --) Depth: 32 00:14:41 3184mN

[AdminX]

[d]4r1k1/R4pp1/3b3p/1q6/2p5/2Bp1PP1/1P5P/1N3Q1K w - - 0 25

[JuLieN]

SF now suggests 25. Qh3... definitely not a human move... or at least one that would come to me easily...

EDIT:
Yep, Anand played the more human move Nd2

[AdminX]

[d]4r1k1/R4pp1/3b3p/1q6/2p5/2Bp1PP1/1P1N3P/5Q1K b - - 0 25

[JuLieN]

And now SF gives black an edge!

[Sven]

Analysis by Stockfish 1.7.1-16 JA 64bit:
[...]
24...h6 25.Qh3 Bb4 26.Qd7 Qxd7 27.Rxd7 Re2 28.Bxb4 Rxb2 29.Nd2 Rxb4 30.Rd4 Ra4 31.Nxc4 Kh7 32.Rf4 Ra2 33.Rxf7 d2 34.Nxd2 Rxd2
+/- (1.21) Depth: 13 00:00:02 394kN
+/- (1.09 --) Depth: 32 00:14:41 3184mN

The given PV ends up in a rook endgame that looks drawish:
[d]
Can White improve over 25.Qh3, maybe with 25.Nd2?

Sven