Check It Out: 13.Bf4
Okay, so the black e-pawn is pinned to the Queen, but then the queen threatens destruction with:
Right. Now what? Moves 14 - 24 are mind-blowing.
How do you even think of that? An example of really excellent d-file pressure. For all that chess computers are hated on, they reinforce the notion that chess is still a beautiful game even with all their damn logic.
Clog up the d-file and apply pressure to a2.
Giving up the f pawn would not be my first choice.
Cool; sac the knight, munch the a-pawn, and kill with the three connected passed pawns.
This game had three stages:
Stage 1: Opening book: every move seems to advance the attack/counter attack theme of the Sicilian Defense: Scheveningen Variation. English Attack.
Stage 2: White sacs a piece for open lines and a vulnerable black king. Apparently Anand has not pulled this one off - yet.
Stage 3: Recover the piece, get rid of the rooks, and simplify to a won end game.
<al wazir> I suspect that HIARCS decided aiming for g7 was more critical than aiming for a6. It already knew that it's king was going to mop those queen-side puppies up.
<Cushion> Yes, it would be rather disturbing if HIARCS had foreseen everything to the end and played 13.Bf4 with a yawn.