Grischuk-Karjakin, FIDE Grand Prix 2008

[jdart]

from a game played yesterday in the FIDE Grand Prix, Sochi:

[D] 5qk1/6b1/5r2/Q6p/p1P1p1pP/2n3B1/2B2PP1/4R1K1 w - -

Grischuk played Bxe4 here, which appears to be best (but I haven't verified with a really deep search). This is an interesting test because there are a number of plausible alternatives.

My latest build of Arasan switches to Bxe4 at ply 15 (about 2 minutes on an Athlon 4400+).

Toga 1.4b5 played Bxe4 at ply 12 (37 seconds).

Shredder 10 liked both Qxh4 and Bxa4 before finally playing Bxe4 at ply 19 (703 seconds).

--Jon

[AdminX]

5qk1/6b1/5r2/Q6p/p1P1p1pP/2n3B1/2B2PP1/4R1K1 w - - 0 1

1.66 Ghz Core2Duo
Analysis by Deep Shredder 11 UCI:

1.Qxc3 Rxf2 2.Qxg7+ Kxg7 3.Bxf2
+- (4.96) Depth: 1/1 00:00:00
+- (1.94) Depth: 2/2 00:00:00

1.Qxh5 a3
+- (2.11) Depth: 2/5 00:00:00
+/- (1.19) Depth: 12/36 00:00:05 5259kN

1.Qxc3 Rxf2 2.Be5 Qc5 3.Bxg7 Rxc2+ 4.Qd4 Qxd4+ 5.Bxd4 a3 6.c5 a2 7.Kh2 Kf7 8.Kg3 Ke6 9.Ra1 Kd5 10.Be3 Ke5
+/- (1.28) Depth: 12/40 00:00:18 19219kN

1.Bxa4 Rf5 2.Qa6 Rf6 3.Bc6 Qc5 4.Qa8+ Rf8 5.Bd5+ Kh8 6.Qc6 Qxc6 7.Bxc6 Rc8 8.Bd5 Nxd5 9.cxd5 Rd8
+/- (1.31) Depth: 12/40 00:00:21 22996kN
+/- (1.31) Depth: 13/27 00:00:24 23847kN

1.Bxe4 Nxe4 2.Rxe4 a3 3.Re3 Rf5 4.Qxa3 Qxa3 5.Rxa3 Rc5 6.Ra4 Kf7 7.Bd6 Rc8 8.c5 Kg6 9.Ra7 Bc3 10.Re7
+- (1.83) Depth: 13/36 00:00:27 28548kN
+- (1.89) Depth: 14/36 00:00:31 32634kN



1.66 Ghz Core2Duo
Analysis by Glaurung 2.1:

1.Qxc3 Rxf2
+- (2.41) Depth: 2 00:00:02

1.Qxh5 a3 2.c5 Qf7 3.Qxg4 a2 4.Qc8+ Kh7 5.Qg4 Qg6 6.Qxg6+ Kxg6 7.Kf1 Rc6 8.Bd6 Kf5
+- (2.60) Depth: 2 00:00:02
+- (1.96) Depth: 12 00:00:06 2660kN

1.Bxe4 Nxe4 2.Rxe4 a3 3.Re3 Rf5 4.Qxa3 Qxa3 5.Rxa3 Kf7 6.Kf1 Rc5 7.Ra4 Be5 8.Bxe5 Rxe5
+- (2.35) Depth: 12 00:00:12 3492kN
+- (2.41) Depth: 13 00:00:12 4217kN