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Subject: Re: WinFinder - first assumpitons

Author: Eduard Nemeth

Date: 10:01:43 01/05/06

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On January 05, 2006 at 12:36:22, Oreopoulos Kostas wrote:

>I have been testing Winfinder in Nolot 1 and some other positions
>
>My first impression is
>
>If the position is "easy" then an ambition about 0,60 will find a winning
>variation very fast.
>
>In a very very hard position, like nolot, a high setting like 2.0 will result to
>very bad results.
>For such hard positions, propably as small ambition like 0.3-0.4 would be
>better.

Only Question is, what is a very hard position?

This:

BS-Test, Position 1:

[D]4r1k1/p1pb1ppp/Qbp1r3/8/1P6/2Pq1B2/R2P1PPP/2B2RK1 b - - 0 1

Analysis by Rybka WinFinder 1.0 32-bit (on P3 600 MHz, 64 MB hash):

1...Td6+
  ³  (-0.36)   Tiefe: 3   00:00:00
1...Td6+
  ³  (-0.41)   Tiefe: 4   00:00:00
1...Dxa6+
  ³  (-0.48)   Tiefe: 4   00:00:00
1...Dxa6+ 2.Txa6
  =  (-0.20)   Tiefe: 5   00:00:00
1...Td6+ 2.Dxd3
  ³  (-0.37)   Tiefe: 5   00:00:00
1...Td6+ 2.Dxd3 Txd3+ 3.La3
  ³  (-0.40)   Tiefe: 6   00:00:00  49kN
1...Td6+ 2.Dxd3 Txd3+ 3.La3 Le6
  ³  (-0.45)   Tiefe: 7   00:00:01  49kN
1...Td6+ 2.Dxd3 Txd3+ 3.La3 Le6 4.Lxc6+
  ³  (-0.52)   Tiefe: 8   00:00:02  49kN
1...Dxa6+ 2.Txa6 c5+ 3.Lg4 cxb4+
  µ  (-1.00)   Tiefe: 8   00:00:02  49kN
1...Dxa6+ 2.Txa6 c5+ 3.Lg4 cxb4+ 4.cxb4 Td6+
  µ  (-1.19)   Tiefe: 9   00:00:03  49kN
1...Dxa6+ 2.Txa6 c5+ 3.Lg4 cxb4+ 4.cxb4 Td6+ 5.Lxd7+
  µ  (-1.10)   Tiefe: 10   00:00:04  67kN
1...Dxf3+ 2.gxf3 Tg6+ 3.Kh1 Lh3 4.Dd3 f5 5.Dc4 Kf8
  -+  (-1.70)   Tiefe: 12   00:00:11  184kN
1...Dxf3+ 2.gxf3 Tg6+ 3.Kh1 Lh3 4.Dd3 f5 5.Td1 Lg2+ 6.Kg1 Lxf3+ 7.Kf1 Lxd1
  -+  (-2.30)   Tiefe: 14   00:00:27  489kN

(Nemeth, Privat 05.01.2006)

Rybka WinFinder 1.0 need only 11s on my slow computer!!

BS-Test, Pos. 1:
4r1k1/p1pb1ppp/Qbp1r3/8/1P6/2Pq1B2/R2P1PPP/2B2RK1 b - - 0 1

Analysis by Rybka 1.01 Preview 2 32-bit:

1...Td6+
  ³  (-0.36)   Tiefe: 3   00:00:00
1...Td6+
  ³  (-0.41)   Tiefe: 4   00:00:00
1...Dxa6+
  ³  (-0.48)   Tiefe: 4   00:00:00
1...Dxa6+ 2.Txa6
  =  (-0.20)   Tiefe: 5   00:00:00
1...Td6+ 2.Dxd3
  ³  (-0.37)   Tiefe: 5   00:00:01
1...Td6+ 2.Dxd3 Txd3+ 3.La3
  ³  (-0.40)   Tiefe: 6   00:00:01  7kN
1...Td6+ 2.Dxd3 Txd3+ 3.La3 Te5+
  ³  (-0.48)   Tiefe: 7   00:00:01  16kN
1...Td6+ 2.Dxd3 Txd3+ 3.La3 Le6 4.Lxc6+
  ³  (-0.52)   Tiefe: 8   00:00:03  42kN
1...Dxa6+ 2.Txa6 c5+ 3.Lg4 cxb4+
  µ  (-1.00)   Tiefe: 8   00:00:03  50kN
1...Dxa6+ 2.Txa6 c5+ 3.Lg4 cxb4+ 4.cxb4 Td6+
  µ  (-1.19)   Tiefe: 9   00:00:04  67kN
1...Dxa6+ 2.Txa6 c5+ 3.Lg4 cxb4+ 4.cxb4 Td6+ 5.Lxd7+
  µ  (-1.10)   Tiefe: 10   00:00:05  96kN
1...Dxa6+ 2.Txa6 c5+ 3.Lg4 cxb4+ 4.cxb4 Td6+ 5.Lxd7+ Txd7+ 6.Ta3
  µ  (-1.23)   Tiefe: 11   00:00:08  189kN
1...Dxa6+ 2.Txa6 c5+ 3.Lg4 cxb4+ 4.cxb4 Td6+ 5.Lxd7+ Txd7+ 6.Ta3 Td4+
  µ  (-1.01)   Tiefe: 12   00:00:13  329kN
1...Dxf3+ 2.gxf3 Tg6+ 3.Kh1 Lh3 4.Dd3 f5 5.Td1 Lxf2 6.Dc4 Kf8 7.Df1
  -+  (-1.89)   Tiefe: 12   00:00:20  553kN
1...Dxf3+ 2.gxf3 Tg6+ 3.Kh1 Lh3 4.Dd3 f5 5.Td1 Lg2+ 6.Kg1 Lxf3+ 7.Kf1 Lxd1 8.Ta1
  -+  (-2.11)   Tiefe: 13   00:00:29  854kN

(Nemeth, Privat 05.01.2006)

Rybka 1.01 Preview 2 need 20s to solved this position on my P3 600 MHz! :-)

>
>But i guess Vasik could tell us how to use the settings efficiently.
>Anyone tested it with nolots?



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