(1) Efimenko,Z (2689) - Naiditsch,A (2684) [E21]
Match Mukachevo UKR (3), 14.08.2010
[Golubev, Mikhail]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.g3 0-0 6.Bg2 cxd4 7.Nxd4 d5 8.cxd5 Nxd5 9.Qb3 Qa5 10.Bd2 Nc6 11.Nxc6 bxc6 12.0-0 Bxc3 13.bxc3 Ba6 14.Rfd1 Qc5 15.e4 Bc4 16.Qa4 Nb6 17.Qb4 Qh5 18.Re1!?
The famous Kramnik's novelty from the 2008 world championship match. Since then, a couple of new games on the same topic were played.

18...c5 19.Qa5 Rfc8 20.Be3 Be2 21.Bf4 Bd3
In Kramnik-Anand, Bonn Wch 2008 (Game 10) Black tried 21...e5 but did not manage to solve his problems and later lost.

[In the game Mamedyarov-Jakovenko, Astrakhan 2010 (Round 1) White achieved no advantage after 22.e5 Nd5 23.Be3 Qxe5 24.Bxc5 Qc7 25.Qxc7 Rxc7 ]

[22...Bc2 23.Rc1 Bd3 transposes to the game]

23.Rc1 Bd3!N
[Mamedyarov-Leko, Astrakhan 2010 (Round 12) saw 23...Bg4?! 24.c4! Bh3 25.Bxh3 Qxh3 26.Qb5 f6 27.e5 with a big White's advantage.]

[Black's novelty was already analysed by GM Shipov who provided the line 24.e5 Nc4 25.Qa6 g5 26.Bxa8 Rxa8 with Black's attack.]

[After the more obvious 24...Nc4 White must play 25.Qa6 This line was undoubtedly prepared by Efimenko.]

After this capture, Black obtains a sufficient positional compensation for the pawn: White's dark squared bishop will be dominated by the black knight.

25...Nc4 26.Qb5 a6 27.Qd7 Be2!
[Avoiding 27...Rd8 28.Qf5! ]

[Black also seems to be OK after 28.Rc2 Bg4 ]

28...Bg4 29.Qb7 f6!?
[Black hardly should go for 29...Rcb8 30.Qd5 Be6 31.Qd1 ; Possible was 29...Be6 ]

This retreat is unimpressive. [maybe White could try 30.Rb1!? ]

Around here only Black could have tried to play for a win, but Naiditsch did not find serious chances. The game ended in a repetition of moves.

31.Be3 Be6 32.Bf1 Rcb8 33.Qc7 Rc8 34.Qb7 Rcb8 1/2-1/2