elohah: We now must comb back thru the GAME and find where Anish Giri ( 2552) FUMBLED THE BALL to allow this, since he was clearly better thru move 27. The error is not hard to find:
29...Re8
30 Bh4?
'What's this?' (Bobby)
What Anish Giri should have played:
30 Rxe8! Qxe8
31 Qc2! Qf7
32 Bd3! Nf6
(32...Bxc3 33 bxc3 Qxd5 34 Bxf5 - plus)
33 Bxf5 Bxf5
34 Qxf5 Bxc3
35 bxc3 Nxd5
and now... and now??
36 Qg5+! will forcibly remove the d6 pawn, remaining with an advantage - the same advantage he already had.
Final question: How should White proceed had Black played the correct 33...Bd4!
After: 34 Nxd4 cxd4
Both 35 Qc2? and 35 Qd3? failed.
The ONLY way now is ... Yes?
35 Bxf6! Qxf6
36 Qc2! Qd8!
37 Qc4
recovering the pawn.
But after 37...Bd7!
38 Bxd7 Qxd7
39 Qxd4
It's only equality.