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Subject: Re: Testposition - Hungarian Rhapsody

Author: Dieter Buerssner

Date: 07:32:46 03/16/01

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On March 16, 2001 at 05:45:10, Sune Larsson wrote:

>
>  r2q1rk1/pp4pp/5p2/4pb2/1PPp3Q/P1n1PP2/3R2PP/4KBNR b K - 0 1
>
>  Quinteros-Ribli, Montilla 1974
>
>  In this GM battle the black pawn on d4 is about to fall. But black's
>  lead in development is so great that he can unleash a mating attack
>  against the poorly placed white king, by sacrificing his queen for a
>  rook and planting a pawn on e3.
>
>  This is far from "gambling with a sacrifice". It is simply chess.
>  White's pieces are not participating in the game, so the "normal"
>  pawn counting is not valid. And white is punished severely for
>  neglecting his development. The game went:
>
>  1.-dxe3! 2.Rxd8 Rfxd8 3.Be2 Rd2
>
>  (White is completely tied up. Note the constricting part played by pawn e3.)
>
>  4.g4 Bd3 5.Kf1 Nxe2 6.Nxe2 Rxe2 7.Kg1 Rd8  0-1
>
>
>  Test: We wanna see them programs play 1.-dxe3! ;)

Yace sticks with Qe8:

   2068860  22.081   1.58  8.  1...Qe8 2.c5 Qa4 3.Bc4+ Kh8 4.exd4 Qxa3 5.Kf1
                               Qxb4 6.Bd3 {80}
   3288171  34.392   1.60  9t  1...Qe8 2.c5 Qa4 3.Bc4+ Kh8 4.exd4 Qxa3 5.Kf1
                               Qxb4 6.Bd3 Ne4 {80}
   3786916  39.789   1.61  9t+ 1...Nb1 2.Rd3 Qe7 3.e4 Be6 4.Rb3 Nxa3 5.Ne2
                               Nxc4 6.Nxd4 {80}
   4131765  45.566   1.65  9t  1...Nb1 2.Rd3 Qe7 3.c5 Bxd3 4.Bxd3 g5 5.Qf2 Nc3
                               6.Ne2 {150}
   6444408  1:09.6   1.65  9.  1...Nb1 2.Rd3 Qe7 3.c5 Bxd3 4.Bxd3 g5 5.Qf2 Nc3
                               6.Ne2 {150}
   8288111  1:32.0   1.61 10t  1...Nb1 2.Rd3 Qe7 3.c5 Bxd3 4.Bxd3 g5 5.Qf2 Nc3
                               6.Bc4+ Kh8 7.Ne2 {150}
  10381167  1:57.3   1.62 10t+ 1...Qe8 2.c5 Qa4 3.Bc4+ Kh8 4.exd4 Qxa3 5.Kf1
                               Qxb4 6.Bd3 Bxd3+ 7.Ne2 {430}
  16037431  3:02.3   1.80 10t  1...Qe8 2.g4 dxe3 3.Rd6 Qa4H 4.gxf5H Rad8H
                               5.Qf2H {HT} {-270}
  22508987  4:09.1   1.80 10.  1...Qe8 2.g4 dxe3 3.Rd6 Qa4 4.gxf5 Rad8 5.Qf2
                               {HT} {-270}
  46395100  8:34.5   2.07 11t  1...Qe8 2.Kf2 dxe3+ 3.Kxe3 e4 4.f4 Qa4 5.g4
                               Qxa3 6.gxf5 Nb1+ 7.Ke2 Nxd2 8.Kxd2 Rfd8+ 9.Ke1
                               {-110}
  64617558 11:36.6   2.07 11.  1...Qe8 2.Kf2 dxe3+ 3.Kxe3 e4 4.f4 Qa4 5.g4
                               Qxa3 6.gxf5 Nb1+ 7.Ke2 Nxd2 8.Kxd2 Rfd8+ 9.Ke1
                               {-110}

But the scores are pretty close. After 1...dxe3:


   1107238  11.638  -1.68  9.  2.Rxd8 Raxd8 3.Be2 Bd3 4.Bd1 Nxd1 5.Ne2 Nf2
                               6.Rg1 g5 7.Qh6 {71}
   1930200  18.598  -1.98 10t  2.Rxd8 Raxd8 3.Be2 Bd3 4.Bd1 Nxd1 5.Nh3 Rd4
                               6.f4 Bxc4 7.Qh5 exf4 {-89}
   2119866  20.270  -1.98 10.  2.Rxd8 Raxd8 3.Be2 Bd3 4.Bd1 Nxd1 5.Nh3 Rd4
                               6.f4 Bxc4 7.Qh5 exf4 {-89}
   4529436  47.501  -2.03 11t  2.Rxd8 Rfxd8 3.Be2 Bd3 4.Bd1 Nxd1 5.Kxd1 Bf1+
                               6.Ke1 Bxg2 7.Qe4 Bxh1 8.Qxe3 Bg2 9.Ne2 {-89}
   5081281  54.421  -2.03 11.  2.Rxd8 Rfxd8 3.Be2 Bd3 4.Bd1 Nxd1 5.Kxd1 Bf1+
                               6.Ke1 Bxg2 7.Qe4 Bxh1 8.Qxe3 Bg2 9.Ne2 {-89}
  12307966  1:58.4  -2.11 12t  2.Rxd8 Rfxd8 3.Be2 Bd3 4.Bd1 Nxd1 5.Kxd1 Bf1+
                               6.Ke1 Bxg2 7.Qe4 b6 8.Qxe3 Bxh1 9.c5 Rd4 {-89}
  13490713  2:10.3  -2.11 12.  2.Rxd8 Rfxd8 3.Be2 Bd3 4.Bd1 Nxd1 5.Kxd1 Bf1+
                               6.Ke1 Bxg2 7.Qe4 b6 8.Qxe3 Bxh1 9.c5 Rd4 {-89}
  40431863  6:26.2  -2.46 13t  2.Rxd8 Raxd8 3.Be2 Rd2 4.Kf1 Nxe2 5.Nxe2 Rd1+
                               6.Qe1 Rfd8 7.g4 Rxe1+ 8.Kxe1 Bc2 9.Ng1 Rd3
                               10.Ke2 {HT} {-90}

-- Dieter




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