[Event "13th ECC qual. group 6"]
[Site "Heraklio GRE"]
[Date "1997.10.12"]
[Round "3"]
[White "Porfiriadis, Sotirios HERA"]
[Black "Onischuk, Alexander LAZV"]
[Result "0-1"]
[WhiteElo "2340"]
[BlackElo "2625"]
[ECO "A87"]
[EventDate "1997.??.??"]
[Annotator "Tyomkin,D"]
[PlyCount "78"]

1.d4 f5 2.Nf3 Nf6 3.g3 g6 4.Bg2 Bg7 5.O-O O-O 6.c4 d6 7.Nc3 Na6 8.Rb1 c6 
9.b4 Ne4 10.Nxe4 
    ( 10.Qb3 N {Tyomkin,D} 10...Nxc3 11.Qxc3 Qe8 12.Bb2 h6 13.Qd2 += Bd7?!
        ( 13...e5!? 14.dxe5 dxe5 15.b5 Nb8!? 
            ( 15...cxb5 16.Qd5+ 
                ( 16.Bxe5? Bxe5 17.Qd5+ Be6 18.Qxe5 Bxc4 )
            16...Qe6 
                ( 16...Rf7 17.Bxe5 bxc4 18.Bxg7 Kxg7 19.Qxc4 +/- )
            17.Nxe5 Qxd5 18.cxd5 +/- )
            ( 15...Nc5 16.bxc6 bxc6 17.Qa5 += )
        16.Qd6 e4 17.Nh4 g5 18.Ng6 Rf7 19.Bxg7 Rxg7 20.Ne5 Kh7 
            ( 20...Re7 21.bxc6! bxc6 22.Rxb8 Rxb8 23.Nxc6 Re6 24.Qxb8 +/- 
            )
        21.f4 += )
    14.d5 {()} 14...c5 
        ( 14...Nc7 15.Bxg7 Kxg7 16.e4 fxe4 17.Qd4+ Kh7 18.Nd2 cxd5 19.cxd5
        Nb5 
            ( 19...Qf7 20.Nxe4 Nxd5 21.Nxd6 exd6 22.Bxd5 +/- )
        20.Qe3 Rc8 21.Nxe4 += )
    15.Bxg7 Kxg7 16.b5 Nc7 17.e4 fxe4 18.Qc3+ Kh7 19.Nd2 Qf7 20.Rbe1 Qg7 
    21.Nxe4 b6 
        ( 21...Qxc3 22.Nxc3 Rf7 23.Re3 += {() })
    22.a4 a6 23.Qb3 axb5 24.cxb5 Ra7 25.Re3! {<->e} 25...e6 26.Nxd6 Nxd5 
        ( 26...exd5? {Tyomkin,D} 27.Rfe1 Qd4 28.Re7+ Kg8 29.Qc2 Bf5 30.
        Nxf5 Rxf5 
            ( 30...gxf5 31.Rd7 )
        31.Rd7 +- )
    27.Rd3 +/- {Alterman,B-Nikolic,P/EU-chTM 1997/1-0 (29)} 
        ( 27.Bxd5?! exd5 28.Qxd5 Rxa4 $132 )
    )
    ( 10.Bb2 {Tyomkin,D} 10...Be6 11.Qb3? 
        ( 11.b5 Nc7 12.bxc6 bxc6 13.Qa4 Rb8 14.Ba1 += )
    11...b5 12.Nxe4 Bxc4 13.Qe3 fxe4 14.Qxe4 Nxb4 15.Bh3 Kh8 -/+ {Kramnik 
    Vladimir-Ivanchuk Vassily/It "Melody Amber" (blindfold), Monaco 
    1995/1/2-1/2 (51)} )
10...fxe4 11.Ng5 
    ( 11.Nd2! {Tyomkin,D} 11...d5 
        ( 11...Bxd4 12.Nxe4 Bg7 13.b5 +/- )
    12.b5 Nc7 13.e3 Ne6 
        ( 13...Bf5 14.bxc6 bxc6 15.Ba3 +/- {Beliavsky,A-Nikolic,P/Polanica
        Zdroj 1996 (37)/1-0 })
    14.bxc6 bxc6 15.Qa4 Ng5 16.Qxc6 Nh3+ 17.Kh1 
        ( 17.Bxh3 Bxh3 18.Ba3! Bxf1 19.Kxf1 dxc4 
            ( 19...Rf6?! 20.Qxd5+ Qxd5 21.cxd5 Rb6 22.Rc1 +/- )
        20.Qxc4+ 
            ( 20.Qe6+? Rf7 21.Nxe4 Qc8 )
        20...Kh8 21.Nxe4 Qd7 ~ )
    17...Bg4 18.f4 e6 
        ( 18...exf3 19.Nxf3 dxc4 20.Qxc4+ +- )
    19.Rb7 Rf7 20.Rxf7 Kxf7 21.cxd5 Rc8 22.dxe6+ Bxe6 23.Qa4 {1-0 
    Roeder,M-Beim,V/Open 1996} )
11...d5 12.cxd5 cxd5 13.Nh3? N {The white's main idea in this position is 
to attack e4-point byf2-f3.Black should lose the time for h7-h6 to move 
this knight.} 
    ( 13.Qb3 $142 {Tyomkin,D} 13...Kh8 
        ( 13...Bxd4!? 14.Nxe4 e6 15.b5! ~ )
    14.Be3 Nc7 15.f3 h6 16.Nh3 exf3 17.exf3 g5 18.Rbc1?! 
        ( 18.a4!? Bf5 19.Rbc1 )
    18...Nb5 19.Rcd1 
        ( 19.Qd3?! Qb6 
            ( 19...Nd6 )
        20.Rc5 Nd6 )
    19...Qb6 20.Kh1 Be6 21.Rfe1 Rac8 22.a4 Nd6 23.Bg1 Nf5 24.f4 g4 25.Nf2 
    Nxd4 26.Qe3 Bf5 27.Nxg4 Nc2 28.Qxe7 Qd8 29.Nf2 Nxe1 30.Qxe1 Re8 31.Qf1
    {1/2-1/2 Hansen, C-Vasiukov,E/Graested 1990} )
13...Nc7 14.a4 
    ( 14.Be3 Nb5 15.Rc1 Nd6 )
14...Bf5 15.Be3 Ne8! 16.Rc1 Qd7 17.Nf4 Nf6 =+ 18.h4 h6 19.Bh1 Rac8 20.Qb3 
e6 21.f3 g5 22.hxg5 hxg5 23.Ng2 exf3 24.exf3 g4 25.Nf4 
    ( 25.Nh4 Bh7 -/+ )
25...Rxc1 26.Rxc1 Rc8 27.Rxc8+ Qxc8 28.Nd3? 
    ( 28.Kf2 )
    ( 28.a5 )
28...gxf3 
    ( 28...Qc4!? 29.Qxc4 dxc4 30.Ne5 $8 
        ( 30.Nc5? b6 31.Nb7 Nd5 -+ )
    30...c3 
        ( 30...Nd5?! 31.fxg4 
            ( 31.Nxc4 Bd3 32.Nb2 )
        )
    31.fxg4 Nxg4 32.Nxg4 Bxg4 33.Kf2! {white has good drawing chances} 
        ( 33.Bxb7 c2 34.Kg2 Kh7 )
        ( 33.Be4 Bf5 34.Bxf5 exf5 35.d5 c2 36.Bc1 Kh7 -+ )
    33...c2 34.Be4 Bd1 
        ( 34...Bxd4 $140 ? 35.Bxc2 )
        ( 34...Bf5 35.Kf3 Kf7 36.g4 Bg6 37.Bxb7 Bxd4 38.Bc1 )
    35.Ke1 
        ( 35.Kg2 )
    35...Bf8 36.b5 )
29.Bxf3 Ng4 30.Bxg4 Bxg4 {^^} 31.Ne5 Bf5 32.Qd1 Qc3 33.Bf2? 
    ( 33.Qd2 $142 Qb3! 
        ( 33...Qa1+ 34.Qc1 Qxa4 35.Qc8+ Kh7 36.Qxb7 Qd1+ 37.Kf2 Bh3 
            ( 37...Qc2+ 38.Ke1 )
        38.Qa6 )
    )
33...Be4 
    ( 33...Qxb4? 34.Qh5 )
34.Kh2 Qb2 35.Qe1 Bh6 36.Ng4 Bg5 37.Kg1 Kg7 38.b5 b6 39.Qd1 Qc2 $138 {I 
guess white lost on time in this position} 
    ( 39...Qc2 40.Qf1 
        ( 40.Qxc2 Bxc2 41.Ne5 Bxa4 42.Nc6 Bxb5 43.Nxa7 Bd7 )
        ( 40.Qa1 Bc1! )
    40...Qxa4 41.Ne5 Qa3! 42.Qe2 Qc3 -+ )
0-1

