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Subject: Re: Position from Leiden, Round 10

Author: Andreas Herrmann

Date: 13:33:43 10/30/02

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On October 30, 2002 at 16:13:36, Gerd Isenberg wrote:

>Position from Shark - IsiChessMMX, Leiden Round 10
>
>[D] r4rk1/2n1b1pN/pqb1p1Qp/1p6/P1p3n1/N1P1B3/1PB2PPP/R2R2K1 b - - ; bm Rxf2
>
>Even if the position is already won by black, finding the spectacular 24...Rxf2
>seems quite difficult for some engines. Ruffian is clearly the fastest i tried
>so far on my 2.1XP+ :
>
>Ruffian 1.0.0    2 seconds
>Shredder5       14 seconds
>IsiChessMMX     47 seconds
>
>May be a bad testposition due to Nxe3 wins too.
>
>Cheers,
>Gerd

Hi Gerd,

just tryd my current version of Holmes. I was surprised that Holmes plays also
Rxf2 after only 19 seconds on a AMD K6-2/450 Mhz.

stat. eval: -0,07   (mat. balance: 0,00   pos. val: -0,07)
>1        -892        1        850 1. .. Nf6  {85kNs 0:00}
>1        -778        2       1217 1. .. Nxh2  {61kNs 0:00}
>1        -600        3       2096 1. .. Nxf2  {70kNs 0:00}
>1         183        5       3689 1. .. Nxe3  {74kNs 0:00}
>2         202        6       4274 1. .. Nxe3 2.fxe3 Qxe3+ 3.Kh1  {71kNs 0:00}
>3         175       10       6606 1. .. Nxe3 2.fxe3 Qxe3+ 3.Kh1 Rf2  {66kNs 0:00}
>4         181       23      18299 1. .. Nxe3 2.a5 Qc5 3.fxe3  {80kNs 0:00}
>5         201       41      38606 1. .. Nxe3 2.a5 Qc5 3.fxe3 Qxe3+ 4.Kh1  {94kNs 0:00}
>6         204      143     161459 1. .. Nxe3 2.fxe3 Qxe3+ 3.Kh1 Rf2 4.Rg1 Nd5 5.axb5  {113kNs 0:01}
>7         195      390     447037 1. .. Nxe3 2.a5 Qc5 3.fxe3 Qxe3+ 4.Kh1 Be8 5.Nxf8  {115kNs 0:03}
>7         287     1985    2652586 1. .. Rxf2 2.Nf6+ Bxf6 3.Qh7+ Kf8 4.Bxb6 Rxg2+ 5.Kf1 Nxh2+ 6.Ke1 Bh4+ 7.Bf2 Bxf2+ 8.Kd2  {134kNs 0:19}
>8         287     3254    4454205 1. .. Rxf2 2.Nf6+ Bxf6  {137kNs 0:32}
>9         287     6642    9447803 1. .. Rxf2 2.Nf6+ Bxf6 3.Qh7+ Kf8 4.Bxb6 Rxg2+ 5.Kf1 Nxh2+ 6.Ke1 Nf3+ 7.Kf1 Nh2+  {142kNs 1:06}

have a nice day
Andreas




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