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Up Topic The Rybka Lounge / Test Positions / prison test
- - By defrag1971 (*) [eu] Date 2012-02-06 22:47
2k3bq/pppp1p1p/5P1P/6P1/4K3/8/PPPP4/N7 w - - 0 1


No engine so far realizes White is winning in this simple position, Houdini after several minutes shows -5.98.
Rather than claiming 3300 Elo strength, maybe engine programmers should sometimes focus on writing algorithms about piece activity...
Parent - - By Uly (Gold) [mx] Date 2012-02-07 04:04
These positions don't happen on real games so it would be a waste of time to have any code for them.
Parent - - By defrag1971 (*) [eu] Date 2012-02-07 10:16
Actually they do a lot of times, in milder forms:

Eddy-Silman 1993
Black is winning, White's Bishop is helpless behind his own pawns awainting his doom, every human player understands, still engines give only a small advantage to Black (Houdini --> -0.63) after 10 moves or so it jumps to -6.00...

8/8/4k3/pp3p1p/4p1pP/Pb2P1P1/1P1KP1B1/8 b - - 0 10
Parent - By Uly (Gold) [mx] Date 2012-02-07 10:23
That's a valid example, unlike the first one.
Parent - By Barnard (Bronze) Date 2012-02-07 19:54
Hiarcs shows a clear advantage of black from the first minutes of analizing,without input any move
Parent - - By kgburcham (***) [us] Date 2012-02-11 15:19
I am not sure if I can post using Rybka and Houdini, just delete post if I cannot use Rybka or Houdini.
Difficult to keep up with all of the rules at each forum.
kgburcham

8/8/4k3/pp3p1p/4p1pP/Pb2P1P1/1P1KP1B1/8 b - - 0 1


Houdini 2.0c Pro x64:

1...b4 2.axb4 axb4 3.Kc1 Kd5 4.Bf1 Ba4 5.Kb1 Kc4 6.Kc1 Kb3 7.Kb1 Be8 8.Kc1 Bb5 9.Kb1 Ba4 10.Kc1 Be8 
  =/+  (-0.63)   Depth: 29/46   00:00:00  11663kN
1...b4 2.axb4 axb4 3.Kc1 Kd5 4.Bf1 Ba4 5.Kb1 Kc4 6.Kc1 Kb3 7.Kb1 Be8 8.Bg2 Bb5 9.Bf1 Ba4 10.Bg2 Be8
  =/+  (-0.63)   Depth: 30/46   00:00:01  17392kN
1...b4
  =/+  (-0.69 ++)   Depth: 31/50   00:00:01  36956kN
1...b4
  -/+  (-0.82 ++)   Depth: 31/52   00:00:03  63648kN
1...b4
  -/+  (-1.12 ++)   Depth: 31/62   00:00:05  121mN
1...b4
  -+  (-2.08 ++)   Depth: 31/69   00:00:17  421mN
1...b4 2.axb4 axb4 3.Kc1 Kd5 4.Bf1 Ba4 5.Kb1 Kc4 6.Ka2 f4 7.gxf4 Bc2 8.Bg2 g3 9.Bh1 Kd5
  -+  (-2.96)   Depth: 31/74   00:00:40  1008mN, tb=12
1...b4 2.axb4 axb4 3.Kc1 Kd5 4.Bf1 Ba4 5.Kb1 Kc4 6.Ka2 f4 7.gxf4 Bc2 8.Bg2 g3
  -+  (-2.96)   Depth: 32/74   00:00:57  1468mN, tb=71
1...b4
  -+  (-3.11 ++)   Depth: 33/74   00:01:26  2216mN, tb=102
1...b4 2.axb4 axb4 3.Kc1 Kd5 4.Bf1 Ba4 5.Kb1 Kc4 6.Ka2 f4 7.gxf4 Bc2 8.Ka1 b3 9.Bg2 Kd5 
  -+  (-3.25)   Depth: 33/74   00:01:57  3016mN, tb=125
1...b4
  -+  (-3.41 ++)   Depth: 35/81   00:03:46  6219mN, tb=829
1...b4 2.axb4 axb4 3.Kc1 Kd5 4.Bf1 Ba4 5.Kb1 Kc4 6.Ka2 f4 7.gxf4 Bc2 
  -+  (-3.43)   Depth: 35/81   00:05:01  8375mN, tb=1071

Deep Rybka 4.1 SSE42 x64:

1...b4 2.axb4 axb4 3.Ke1 Kd5 4.Kd2 Ba4 5.Kc1 Kc4 6.Bh1 Kb3 7.Bg2 Bb5 
  -/+  (-1.30)   Depth: 30   00:00:02  1747kN, tb=8
1...b4 2.axb4 axb4 3.Ke1 Kd5 4.Kd2 Ba4 5.Kc1 Kc4 6.Bf1 Kb3 7.Bg2 Bb5 8.Bf1 Ka2 
  -/+  (-1.30)   Depth: 32   00:00:04  3844kN, tb=34
1...b4 2.axb4 axb4 3.Ke1 Kd5 4.Kd2 Ba4 5.Kc1 Kc4 6.Bf1 Kb3 7.Bg2 Bb5 8.Bf1 Ka2
  -+  (-1.42 ++)   Depth: 33   00:00:10  9576kN, tb=90
1...b4 2.axb4 axb4 3.Ke1 Kd5 4.Kd2 Ba4[] 5.Kc1 Kc4 6.Bf1 Kb3
  -+  (-1.57 ++)   Depth: 33   00:00:16  16543kN, tb=150
1...b4 2.axb4 axb4 3.Ke1 Kd5 4.Kd2 Ba4 5.Kc1 Kc4 6.Bf1 Kb3
  -+  (-1.97 ++)   Depth: 33   00:00:34  35025kN, tb=396
1...b4 2.axb4 axb4 3.Ke1 Kd5 4.Kd2 Ba4[]
  -+  (-2.77 ++)   Depth: 33   00:01:18  85810kN, tb=1516
1...b4 2.axb4 axb4 3.Ke1 Kd5 4.Kd2 Ba4[] 5.Kc1 Kc4
  -+  (-4.37 ++)   Depth: 33   00:03:42  255mN, tb=6337
1...b4 2.axb4 axb4 3.Ke1 Kd5 4.Kd2 Ba4[] 5.Kc1 Kc4 6.Kd2 Kb3[] 
  -+  (-7.57 ++)   Depth: 33   00:10:00  673mN, tb=40311
1...b4 2.axb4 axb4 3.Bf1 Ba4 4.Kc1 Kd5[] 5.Kb1 Kc4 6.Ka2[] f4[] 
  -+  (-9.31)   Depth: 33   00:21:05  1444mN, tb=109876
Parent - By Uly (Gold) [mx] Date 2012-02-12 04:30
Both Rybka and Houdini are allowed. The only thing forbidden is pirate links.
Up Topic The Rybka Lounge / Test Positions / prison test

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