Move 2 c5 (white to move)
FEN: rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPP1PPP/RNBQKBNR w KQkq - 0 2
Comment: Ponomariov is still new to the top-level tournaments, so I and the top GMs he faced at Wijk aan Zee are unfamiliar with him. Based on what I've seen of his style (which is Classical and generally cautious) I'd have expected 1. e4 e5.

Move 5 e5 (white to move)
FEN: r1bqkbnr/pp1p1ppp/2n5/4p3/3NP3/8/PPP2PPP/RNBQKB1R w KQkq - 0 5
Comment: This definately seems out of character for "Pono" "SuperMariov".

Move 8 Nc4 (black to move)
FEN: r1bqkb1r/1p3ppp/p1np1n2/4p3/2N1P3/2N5/PPP2PPP/R1BQKB1R b KQkq - 3 8
Comment: foregoes the pin on Nf6 (created by Bc1-g5) in order to reposition the knight. It also avoids the Pelikin Variation (8. Bg5 d5) . And, as the game shows, it's also a pawn sacrifice offer.

Move 11 Nxe4 (white to move)
FEN: r1bqkb1r/5ppp/p1np4/3Np3/1p2n3/4N3/PPP2PPP/R1BQKB1R w KQkq - 0 11
Comment: Despite the open look of this position it seems Ponomariov is playing in a Classical way, hoping to control the center, developing pieces and grabbing Pe4. Each is separate positional aspects. Anand, on the other hand, is forced, by the nature of this variation, to play more dynamically; for best piece positions in the center, gambiting Pe4 and then utilizing those advantages forcefully.

Move 11 a3 (black to move)
FEN: r1bqkb1r/5ppp/p1np4/3Np3/1p2n3/P3N3/1PP2PPP/R1BQKB1R b KQkq - 0 11
Comment: When the opponent's position is open and full of weaknesses then it makes sense to open lines for your pieces to have greater general mobility, as long as it doesn't offer the opponent opportunities to just trade pieces.

Move 12 Rxa3 (black to move)
FEN: r1bqkb1r/5ppp/p1np4/3Np3/4n3/R3N3/1PP2PPP/2BQKB1R b Kkq - 0 12
Comment: It's time to re-evaluate: Black has an extra pawn and apparently a safe king. White has a lead in development and can target Black's knights, Pa6 and perhaps square b6 is a good invasion point. It seems to me White's plan could be Ne3-c4, Bc1-e3-b6, Nd5-c7+ and combined with that dark-square play he might also be able to play Ra1-e3 or Qd1-f3 to have some activity on light squares.

Move 13 g6 (white to move)
FEN: r1bqkb1r/5p1p/p1np2p1/3Np3/4n3/R3N3/1PP2PPP/2BQKB1R w Kkq - 0 13
Comment: Fritz7 suggests several good alternative moves which are quicker to develop and prepare O-O.

Move 13 c3 (black to move)
FEN: r1bqkb1r/5p1p/p1np2p1/3Np3/4n3/R1P1N3/1P3PPP/2BQKB1R b Kkq - 0 13
Comment: Controlling d4 is good, but this blocks Ra3 from moving laterally.

Move 14 Bd7 (white to move)
FEN: r2qkb1r/3b1p1p/p1np2p1/3Np3/4n3/R1P1N3/1P3PPP/2BQKB1R w Kkq - 1 14
Comment: Why not ...Bg7 or ...f7-f5?

Move 15 Rb8 (white to move)
FEN: 1r1qkb1r/3b1p1p/p1np2p1/3Np3/2N1n3/R1P5/1P3PPP/2BQKB1R w Kk - 3 15
Comment: Black is already compelled to offer Pa6 to prevent annihilation.

Move 16 Bb6 (black to move)
FEN: 1r1qkb1r/3b3p/pBnp2p1/3Npp2/2N1n3/R1P5/1P3PPP/3QKB1R b Kk - 1 16
Comment: This much has gone smoothly and Black couldn't resist much. Can Black walk away from that pressure and survive (...Qd8-h4) ?

Move 17 Rxb6 (white to move)
FEN: 3qkb1r/3b3p/prnp2p1/3Npp2/2N1n3/R1P5/1P3PPP/3QKB1R w Kk - 0 17
Comment: a drastic measure, but perhaps correct. Now White will have a slight material advantage, but Black will keep his king safer. Does White take the material and then find he has no dynamic plan? I think Pa6 is still weak and might be captured and the imposing pawns Black has advanced will require some active piece support to be of much use. There is still "all to play for".

Move 17 Ncxb6 (black to move)
FEN: 3qkb1r/3b3p/pNnp2p1/3Npp2/4n3/R1P5/1P3PPP/3QKB1R b Kk - 0 17
Comment: according to Fritz7

Move 18 Bh6 (white to move)
FEN: 3qk2r/3b3p/pNnp2pb/3Npp2/4n3/R1P5/1P3PPP/3QKB1R w Kk - 1 18
Comment: threatening ...Bh6-d2+ to force White's king into a very awkward position, blocking Bf1 and terribly exposed to Black's pieces

Move 19 Bxe4 (black to move)
FEN: 3q1rk1/3b3p/pNnp2pb/3Npp2/4B3/R1P5/1P3PPP/3QK2R b K - 0 19
Comment: Evidently Anand thought Ne4 was as good as Bd3 would ever be and just made his king safer by eliminating the attacker, doubling Black's pawns in the process.

Move 21 Be6 (white to move)
FEN: 3q1rk1/7p/pNnpb1pb/3Np3/4p3/R1P5/1P3PPP/3Q1RK1 w - - 2 21
Comment: He had to keep this piece on the board; it could be a crucial piece for an offensive aimed at g2.

Move 26 Rfa1 (black to move)
FEN: R2n1r2/6kp/1N1p2pb/3Np3/4p2P/2P5/1P2bP1P/R5K1 b - - 1 26
Comment: White has few worries now. Kg1 is pretty safe and it should be easier now to align pieces to force exchanges.

Move 27 Nd7 (black to move)
FEN: R2n1r2/3N2kp/3p3b/3Np1p1/4p2P/2P5/1P2bP1P/R5K1 b - - 1 27
Comment: Fritz7 now sees a massive advantage for White.

Move 28 Rf5 (white to move)
FEN: R2n4/3N2kp/3p3b/3Nprp1/4p2P/2P5/1P2bP1P/R5K1 w - - 2 28
Comment: Moving along the back rank would allow White to double rooks on the pinned Nd8, finally forcing trades.

Move 29 Rg8+ (black to move)
FEN: 6R1/3N2kp/3p3b/3Npr2/4p2p/2P5/1P2bP1P/R5K1 b - - 1 29
Comment: When it rains it pours for Black. Here he'd hoped to have the g-file for himself, but White uses a neat tactic to grab it first.

Move 31 Rf3 (white to move)
FEN: 6R1/R2N1k1p/3p3b/3Np3/4p2p/2P2r2/1P2bP1P/6K1 w - - 4 31
Comment: threatening Kxg8

Move 31 N7f6+ (black to move)
FEN: 6R1/R4k1p/3p1N1b/3Np3/4p2p/2P2r2/1P2bP1P/6K1 b - - 5 31
Comment: White has encircled the Black king and is just trying to find that particular pattern which results in checkmate.

Move 33 Ng4 (black to move)
FEN: 6R1/4R2p/3p3b/3Npk2/4p1Np/2P2r2/1P2bP1P/6K1 b - - 9 33
Comment: threatening Nxh6#

Move 34 Nge3+ (black to move)
FEN: 6R1/4R2p/3p4/3Npk2/4p2p/2P1Nr2/1P1bbP1P/6K1 b - - 11 34
Comment: Black is forced to trade to stave off checkmate. If 34...Bxe3 35. Nxe3+ Kf4  (35...Kf6 36. Nd5+ Kf5 37. Rf8+)  36.Rg4#