YouRang: It appears that things really went south for Kamsky (black) on his 24th move:
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Here, black looks bad. His pieces are cramped (most notably his queen) and his a6-pawn is in danger, which would give white an advanced passer on the a-file. Black played 24...g5?, perhaps hoping for 25.fxg5 Nxe5 and a pretty even game. Ivanchuk had none of that and went on to win with the strong 25.Nc6!, forcing ...Qe8 -- an even more cramped position soon to be followed with more material loss. I believe Kamksy's best choice looked like this:
24...Nb8! <guards the a6 pawn and frees up his queen a bit. Note that white can't take the c4 pawn: 25.Rxc4? Qd1+! 26.Kg2 Qg4+ and black
gratefully takes the perpetual check & draw> 25.h3 <now threatening Rxc4 since the perpetual is erased by the luft at h2> f6 <in hopes of exchanging pawns to mobilize his bishop and rook> 26.Rxc4 <the point of h3> fxe5
27.Nc8 <threatening Nb8 and Pe7> [diagram]
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27...Qd7! 28.Qxb8 <white wins a knight, but his knight is pinned & needs the rook to guard it> 29.Bb6 <not 29.Bxf4? Qd1+ 30.Kh2 Qe2! threatening Qxc4 and Qxf2+ with perpetual check> Bf6 <with Pe7 now protected, black threatens ...Qxh3 &
...Qg4+ & perpetual>
30.Kh2 <must guard h3> f3 <making the white king exposed and very uncomfortable with g2 under black control> 31.Be3 <cutting off Q access to e1> Qe6 <threatening the bishop fork ...Be5+> 32.Re5 <preventing bishop fork> [diagram]
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Here, black has 32...Kg7! <getting his king off the back rank and guarding h6. Black now threatens to deflect the white queen from the b8-h2 diagonal. For example, if the queen unpins itself with 33.Qc7, then 33...Rxc8! 34.Qxc8 Qd6+ 35.Kg1 Qd1+ 36.Kh2 Qd6+ (perpetual)> 33.Bf4 <guarding the diagonal, but allowing...> Qe1 <threat ...Qxf2 & mate> 34.Be3 Rd8! <threat ...Rd1 & mate soon> 35.Rc1 Qxa5 <winning a pawn and threatening the bishop fork ...Be5+> 36.Qg3 <unpinning his knight and helping with defense, with hopes of getting rid of Pf3> Qf5 <threating white knight, guards Pf3, and threatens pin ...Be5> 37.Qg4 <"xray" protection of knight & threat to exchange Qs> Be5+ 38.Kg1 Bxb2 <attack R and give us a passer on a-file> 39.Qxf5 gxf5 <exchange Qs> 40.Rb1 <save rook and attack bishop> Bf6 <save bishop & guard Pe7> Kf7 <guards Pe7 (freeing bishop) & centralize king on light sq> [diagram]
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Black has 3 pawns for a piece, and excellent drawing chances. |