acirce: This was the final round of Linares 2003. If anyone had won the game, he would have tied for first with Leko and Kramnik. It has to be said that Kasparov came relatively close in spite of being Black, and he really went for it from move one. Good fight.
Here are some of the most significant comments by Khalifman in Soloviov: "Super Tournaments 2003"
15..Nh5! <Black starts an offensive. He is threatening ..g6-g5 now.>
16..e5!? <This is fairly aggressive and very creative too. Black is aiming at opening files in the center after ..f7-f5. The position after that move would be a bit similar to the Chelyabinsk variation. Black's pieces are very active but the d6-pawn is vulnerable.>
18.Red1? <This is a serious imprecision and Black seizes the initiative after it. White had to trade pawns first - 18.exf5! gxf5 19.Red1! e4 20.fxe4 fxe4 21.Qxd6 Qxd6 (the move 21..Qf7 is already senseless due to 22.Rf1) 22.Rxd6 Nf4 23.Nxf4 Rxf4 - Black has some compensation for the pawn indeed, but still he has to fight for a draw. Should Black capture on f5 with the queen after 18..g5 19.Bf2 Qxf5, White preserves his initiative with: 20.Qxd6 (it is also interesting for him to play 20.Nb5, for example: 20..d5 21.Nc7 Rac8 22.Nxd5 Qxc2 23.Qxc2 Rxc2 24.Ne7+ Kf7 25.Rxa7 Rb8 26.Nf5 and White is better) 20..Qxc2 (but not 20..e4 21.Nd4 Bxd4 22.Qxd4 exf3 23.g4! and White wins - Anand.) 21.Qe6+ Kh8 22.Qe7 Bc6 23.Rxa7 Qxb3 24.Rxa8 (24.Rc7!?) 24..Bxa8 25.Qa3 Qe6 26.Qa7, and Black must still prove that his compensation for the eventual loss of the b6-pawn would be sufficient.>
19..g5 <Black continues to play in the manner "everything forward". It was more prudent for him to continue with 19..Nf4 avoiding the weakening of the f5-square.>
21.h4 <It was too risky for White to capture the pawn here - 21.Qxd6 Qf7 22.Be3 gxh3, because his king would have been quite exposed.>
22.Qxd6 <This again does not look like the most accurate move, because the arising position is in favour of Black. White probably had better try 22.Bg3, in order to repel the black knight away from the f4-square. Another interesting idea for White is to play here 22.Ng3, with the idea to exploit later the weakness of the f5-square.>