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Up Topic Rybka Support & Discussion / Rybka Discussion / Quality of Rybka 3 (1-sigma-zero versus move count (d=xx)
- - By HartRook (*) Date 2009-11-10 00:02
Hi!

   I am curious what users think about the quality of the Rybka output, in general terms, as a function of the d-count when the early middlegame is being analyzed.

    I have found that d=20 yields results that are OK---but not all that good when compared to d=22 or d=23. I think when d=22, an approximate quality of the best move chosne is roughly 0.04 (1 standard deviation). Has anyone done a detailed analysis? For d less than 20, a hihg quality and trust-worthy answer is not produced.

      Any opinons on this? I have had Rybka-3 running on a quad core for ~1 year non-stop, and on a dual-core dual as well. I ask the question, because I find that even with a Quad Core 64 bit...that is usually takes ~15 hours before I am willing to accept the result so I can then penetrate more deeply into the position

       Thanks in Advance
                  Mike Hart (Massachusetts)
Parent - By Uly (Gold) Date 2009-11-10 00:15
I don't know, but Rybka gets diminishing returns at some point in where you're better off exploring the variations, specially for positions that Rybka does not find the best move until she has the position on her face.
Parent - By Permanent Brain (*****) Date 2009-11-10 18:58 Edited 2009-11-10 19:01

> even with a Quad Core 64 bit...that is usually takes ~15 hours before I am willing to accept the result so I can then penetrate more deeply into the position


So what could we possibly do about this? If you are "not willing to accept", that's your decision you have already met.

I think the quality of 20+ plies computer analysis is only required if the opponent(s) are, or use computers too. E.g. in online engine competition or in correspondence chess. And even there, I certainly wouldn't waste 15 hours on a single position. But people are different, and often, people won't change what they think.

So I'm not sure what you are asking for, actually? You already know you want d=22 or d=23, so I guess that's just it. You'll have to wait and/or buy a faster computer each year :lol:
- - By RangeFinder (**) Date 2009-11-10 04:30
In my use it seems that Rybka that will find a pretty good move at least by depth 15th, give or take.  But going 20 moves deep is where you'll find a brilliant alternative if one exists/best move.  I haven't had an alternative move offered at d=23 that wasn't already offered by d=20.  If you have, I'd love to see an example for my own curiosity. 

Of course, the quality of moves go down as you move further into the variation.  Even though I like the suggestion I get by d=20, after a couple moves deep into that line I consider the remaining moves as just illustrative.

For really deep diving into positions I think IDeA in Aquarium is just awesome; nothing really compares to it.  And I have seen some new ideas/moves surface in IDeA after letting a position "cook" for a day.

(Sorry for not having any detailed analysis to offer.  Just posting my thoughts here.)
Parent - - By Uri Blass (*****) Date 2009-11-10 06:14
Here are 2 examples from my own analysis(I probably have more examples in a faster machine that I do not use at this moment)

These examples are old enough to have no effect on my correspondence games.

35...Re8 is suggested at depth 23 and not at smaller depth
You may need to have all the game in order to reproduce the analysis and I did not try to find it.

New game - Rybka 3 1-cpu 32-bit, 120'/40
2b2k2/pp2rp2/2p2p1p/6n1/3P3N/P2B2P1/1P3PP1/3R2K1 b - - 0 1


Analysis by Rybka 3 1-cpu 32-bit :

35...Ng5-e4
  =  (0.06)   Depth: 2   00:00:00
35...Ng5-e4
  =  (0.08)   Depth: 3   00:00:00
35...Ng5-e4
  =  (0.17)   Depth: 4   00:00:00
35...Ng5-e4 36.g3-g4
  =  (0.25)   Depth: 5   00:00:00
35...Bc8-e6 36.Rd1-e1
  =  (0.07)   Depth: 5   00:00:00
35...Bc8-e6 36.Rd1-e1 Be6-g4
  =  (0.20)   Depth: 6   00:00:00  2kN
35...Ng5-e4 36.g3-g4 Ne4-d6 37.f2-f3
  =  (0.18)   Depth: 7   00:00:00  3kN
35...Ng5-e4 36.g3-g4 Ne4-d6 37.f2-f3 Bc8-e6
  =  (0.20)   Depth: 8   00:00:00  6kN
35...Re7-d7 36.Bd3-c2 Rd7-d5 37.f2-f3 Rd5-b5
  =  (0.19)   Depth: 8   00:00:00  9kN
35...Re7-d7 36.Bd3-c2 Rd7-d5 37.f2-f3 Rd5-b5 38.b2-b3
  =  (0.20)   Depth: 9   00:00:01  12kN
35...Re7-d7 36.Bd3-c2 Rd7-d5 37.f2-f3 Rd5-b5 38.b2-b3 a7-a5
  =  (0.18)   Depth: 10   00:00:01  22kN
35...Re7-d7 36.Bd3-c2 Rd7-d5 37.f2-f3 Rd5-b5 38.b2-b3 a7-a5 39.Rd1-d2
  ²  (0.29)   Depth: 11   00:00:02  47kN
35...Re7-d7 36.Bd3-c2 Rd7-d5 37.Kg1-f1 Rd5-d8 38.f2-f3 Kf8-g7 39.Kf1-f2
  =  (0.25)   Depth: 12   00:00:05  142kN
35...Re7-d7 36.Bd3-c2 Rd7-d5 37.Kg1-f1 h6-h5 38.Kf1-e2 Rd5-d8 39.Ke2-e3 Rd8-e8+ 40.Ke3-d2 Ng5-e4+ 41.Bc2xe4 Re8xe4 42.Kd2-c3 Re4-e2
  =  (0.25)   Depth: 13   00:00:09  255kN
35...Re7-d7 36.Bd3-c2 Rd7-d5 37.Kg1-f1 h6-h5 38.Kf1-e2 Rd5-d8 39.Ke2-e3 Rd8-e8+ 40.Ke3-d2 Ng5-e4+ 41.Bc2xe4 Re8xe4 42.Kd2-c3 Re4-e2
  =  (0.25)   Depth: 14   00:00:10  306kN
35...Re7-d7 36.Bd3-c2 Rd7-d5 37.Kg1-f1 Ng5-e6 38.Nh4-f5 Ne6-c7 39.Nf5-e3 Rd5-d8 40.Kf1-e2 Kf8-g7 41.Ke2-d3 Bc8-e6
  =  (0.23)   Depth: 15   00:00:17  522kN
35...Re7-d7 36.Bd3-c2 Rd7-d5 37.Kg1-f1 Ng5-e6 38.Nh4-f5 Ne6-c7 39.Nf5-e3 Rd5-d8 40.Kf1-e2 Kf8-g7 41.Ke2-d3 Bc8-e6 42.Kd3-e4 h6-h5 43.Bc2-b1
  =  (0.21)   Depth: 16   00:00:28  848kN
35...Re7-d7 36.Bd3-c2 Rd7-d5 37.Kg1-f1 Ng5-e6 38.Nh4-f5 Ne6-c7 39.Nf5-e3 Rd5-d8 40.Kf1-e2 Kf8-g7 41.Ke2-d3 Bc8-e6 42.Kd3-e4 h6-h5 43.Bc2-b1
  =  (0.21)   Depth: 17   00:00:43  1301kN
35...Re7-d7 36.Bd3-c2 Rd7-d5 37.Kg1-f1 Ng5-e6 38.Nh4-f5 Ne6-c7 39.Nf5-e3 Rd5-b5 40.b2-b4 Rb5-h5 41.Bc2-d3 Bc8-e6 42.f2-f3 Nc7-b5 43.Bd3xb5 Rh5xb5 44.Rd1-c1 Rb5-g5
  =  (0.17)   Depth: 18   00:01:16  2364kN
35...Re7-d7 36.Bd3-c2 Rd7-d5 37.Kg1-f1 Ng5-e6 38.Nh4-f5 Ne6-c7 39.Nf5-e3 Rd5-b5 40.b2-b4 Rb5-h5 41.Bc2-d3 Bc8-e6 42.f2-f3 Nc7-b5 43.Bd3xb5 Rh5xb5 44.Rd1-c1 Rb5-g5
  =  (0.17)   Depth: 19   00:01:54  3530kN
35...Re7-d7 36.Bd3-c2 Rd7-d5 37.Kg1-f1 Ng5-e6 38.Nh4-f5 Ne6-c7 39.Nf5-e3 Rd5-b5 40.b2-b4 Rb5-h5 41.Bc2-d3 Bc8-e6 42.f2-f3 Nc7-b5 43.Bd3xb5 Rh5xb5 44.Rd1-c1 Rb5-g5 45.Kf1-f2
  =  (0.17)   Depth: 20   00:03:26  6459kN
35...Re7-d7 36.Bd3-c2 Rd7-d5 37.Kg1-f1 Ng5-e6 38.Nh4-f5 Ne6-c7 39.Nf5-e3 Rd5-b5 40.b2-b4 Rb5-h5 41.Bc2-d3 Bc8-e6 42.Kf1-e2 Nc7-d5 43.Rd1-c1 Rh5-h2 44.Ne3-f5 Be6xf5
  =  (0.19)   Depth: 21   00:05:43  10274kN
35...Re7-d7 36.Bd3-c2 Rd7-d5 37.Kg1-f1 f6-f5 38.Kf1-e2 Kf8-g7 39.Ke2-e3 Ng5-h7 40.Rd1-e1 Nh7-f6 41.Ke3-f3 Bc8-e6 42.Re1-e5 Rd5xd4 43.Nh4xf5+ Be6xf5 44.Bc2xf5 Rd4-d2 45.Re5-e2 Rd2-d5 46.Bf5-c2
  =  (0.18)   Depth: 22   00:12:06  22374kN
35...Re7-d7 36.Bd3-c2 Ng5-e6 37.Nh4-f5 h6-h5 38.Kg1-f1 Rd7-d5 39.a3-a4 Ne6-c7 40.Nf5-e3 Rd5-d8 41.Kf1-e2 Bc8-e6 42.Ke2-d3 Nc7-d5 43.Ne3xd5 Be6-f5+ 44.Kd3-c3 Bf5xc2 45.Kc3xc2 Rd8xd5 46.Kc2-d3 Kf8-e7 47.Rd1-e1+ Ke7-d7
  =  (0.25)   Depth: 23   00:34:42  63986kN
35...Re7-e8 36.Kg1-f1 h6-h5 37.Bd3-e2 Bc8-e6 38.Be2xh5 Be6-c4+
  =  (0.23)   Depth: 23   01:13:04  141609kN
35...Re7-e8 36.Kg1-f1 h6-h5 37.Bd3-e2 Bc8-e6 38.Be2xh5 Be6-c4+ 39.Kf1-g1 Bc4-e2 40.Bh5xe2 Re8xe2 41.Nh4-f5 Re2xb2 42.d4-d5 c6xd5 43.Rd1xd5 Kf8-e8 44.Nf5-d6+ Ke8-f8 45.a3-a4 a7-a6 46.Nd6-f5 Ng5-e6 47.Rd5-d7
  =  (0.24)   Depth: 24   01:26:27  168034kN
35...Re7-e8 36.Kg1-f1 h6-h5 37.Bd3-e2 Bc8-e6 38.Be2xh5 Be6-c4+ 39.Kf1-g1 Bc4-e2 40.Bh5xe2 Re8xe2 41.Nh4-f5 Re2xb2 42.d4-d5 c6xd5 43.Rd1xd5 Kf8-e8 44.Nf5-d6+ Ke8-f8 45.a3-a4 a7-a6 46.f2-f4 Ng5-e6 47.a4-a5 Kf8-e7 48.Nd6-f5+ Ke7-e8 49.Nf5-h6 Ne6-f8 50.Kg1-h2
  =  (0.22)   Depth: 25   02:09:23  252202kN
35...Re7-e8 36.Kg1-f1 h6-h5 37.Bd3-e2 Bc8-e6 38.Be2xh5 Be6-c4+ 39.Kf1-g1 Bc4-e2 40.Bh5xe2 Re8xe2 41.Nh4-f5 Re2xb2 42.d4-d5 c6xd5 43.Rd1xd5 Kf8-e8 44.Nf5-d6+ Ke8-f8 45.a3-a4 a7-a6 46.f2-f4 Ng5-e6 47.a4-a5 Kf8-e7 48.Nd6-f5+ Ke7-e8 49.Nf5-h6 Ne6-f8 50.Kg1-h2
  =  (0.22)   Depth: 26   03:49:20  399607kN

another example

34.Qf4 is suggested at depth 26 and not at smaller depth that are bigger than 11

3r2k1/5p2/p2Bp1p1/4Q2p/P7/5P1P/2r5/6K1 w - h6 0 1


Analysis by Rybka 3 1-cpu 32-bit :

34.a4-a5
  ²  (0.47)   Depth: 2   00:00:09
34.Qe5-f4
  ²  (0.52)   Depth: 2   00:00:13
34.Qe5-f4
  ²  (0.50)   Depth: 3   00:00:17
34.Qe5-f4
  ²  (0.40)   Depth: 4   00:00:41
34.f3-f4
  ²  (0.43)   Depth: 4   00:01:06
34.f3-f4 Kg8-h7
  ²  (0.43)   Depth: 5   00:01:32
34.Qe5-f4 a6-a5 35.Kg1-f1
  ²  (0.42)   Depth: 6   00:02:13  4kN
34.Qe5-f4 Rd8-c8 35.Qf4-g5 Rc2-c1+
  ²  (0.45)   Depth: 7   00:03:53  8kN
34.Qe5-f4 Rd8-d7 35.h3-h4 a6-a5 36.Qf4-e5
  ²  (0.33)   Depth: 8   00:06:12  12kN
34.Qe5-f4 a6-a5 35.Qf4-e5 Kg8-h7 36.Kg1-f1 Rc2-a2
  ²  (0.46)   Depth: 9   00:07:55  22kN
34.Qe5-f4 a6-a5 35.Qf4-e5 Kg8-h7 36.Kg1-f1 Rc2-a2 37.Qe5-d4
  ²  (0.35)   Depth: 10   00:08:11  30kN
34.Qe5-f4 a6-a5 35.Qf4-e5 Kg8-h7 36.Kg1-f1 Rd8-d7 37.h3-h4
  =  (0.20)   Depth: 11   00:08:40  52kN
34.a4-a5 Rc2-d2 35.Bd6-c5 Rd8-c8 36.Qe5-e1 Rc8-d8 37.Qe1-e3 Rd2-a2 38.Bc5-d4
  =  (0.23)   Depth: 11   00:09:02  94kN
34.a4-a5 Rc2-d2 35.Bd6-b4 Rd2-c2 36.Qe5-a1 Rd8-d5 37.h3-h4 Rc2-e2 38.Qa1-b1
  =  (0.24)   Depth: 12   00:09:15  149kN
34.a4-a5 Rc2-d2 35.Bd6-b4 Rd2-a2 36.Qe5-e1 Rd8-c8 37.h3-h4 Rc8-c2 38.Bb4-c3 Rc2-g2+
  =  (0.22)   Depth: 13   00:09:19  186kN
34.h3-h4 Rd8-d7 35.a4-a5 Rd7-b7 36.Qe5-a1 Rb7-b5 37.Bd6-f4 Rb5-b2 38.Bf4-e5
  =  (0.23)   Depth: 13   00:09:25  241kN
34.h3-h4 Rd8-d7 35.a4-a5 Rd7-b7 36.Qe5-e1 Rb7-b2 37.Bd6-e5 Rc2-e2 38.Qe1-c1 Rb2-c2 39.Qc1-d1 Re2-g2+
  =  (0.23)   Depth: 14   00:09:29  309kN
34.h3-h4 Rd8-d7 35.a4-a5 Rd7-b7 36.Qe5-a1 Rc2-b2 37.Qa1-a4 Rb7-b5 38.Bd6-g3 Rb2-d2 39.Qa4-a1 Rd2-b2 40.Bg3-e1
  =  (0.14)   Depth: 15   00:09:38  514kN
34.a4-a5 Rc2-d2 35.Bd6-b4 Rd2-a2 36.Qe5-e1 Rd8-c8 37.Bb4-d6 Rc8-c2
  =  (0.23)   Depth: 15   00:09:40  568kN
34.a4-a5 Rc2-d2 35.Bd6-b4 Rd2-a2 36.Qe5-e1 Rd8-c8 37.Bb4-d6 Rc8-c2
  =  (0.23)   Depth: 16   00:09:46  748kN
34.a4-a5 Rc2-d2 35.Bd6-b4 Rd2-a2 36.Qe5-e1 Rd8-c8 37.Bb4-c3 Ra2-c2 38.Bc3-d2 Rc2-a2 39.Kg1-f1 Rc8-c2 40.Bd2-f4 Kg8-h7 41.h3-h4 Rc2-g2 42.Bf4-e5
  =  (0.15)   Depth: 17   00:10:04  1413kN
34.a4-a5 Rc2-d2 35.Bd6-b4 Rd2-a2 36.Qe5-e1 Rd8-c8 37.Bb4-c3 Ra2-c2 38.Bc3-d2 Rc2-a2 39.Kg1-f1 Rc8-c2 40.Bd2-f4 Kg8-h7 41.h3-h4 Rc2-g2 42.Bf4-e5
  =  (0.15)   Depth: 18   00:10:47  2984kN
34.a4-a5 Rc2-d2 35.Bd6-b4 Rd2-a2 36.Qe5-e1 Rd8-c8 37.Bb4-c3 Ra2-c2 38.Bc3-d2 Rc2-a2 39.Kg1-f1 Rc8-c2 40.Bd2-f4 Kg8-h7 41.h3-h4 Rc2-g2 42.Bf4-e5 Rg2-d2
  =  (0.15)   Depth: 19   00:11:29  4526kN
34.a4-a5 Rc2-d2 35.Bd6-b4 Rd2-a2 36.Qe5-e1 Rd8-c8 37.Bb4-c3 Ra2-c2 38.Bc3-d2 Rc2-a2 39.Kg1-f1 Rc8-c2 40.Bd2-f4 Kg8-h7 41.h3-h4 Rc2-g2 42.Bf4-e5 Rg2-d2 43.f3-f4 Kh7-g8 44.Be5-c3 Rd2-c2
  =  (0.15)   Depth: 20   00:12:54  7677kN
34.a4-a5 Rc2-d2 35.Bd6-b4 Rd2-a2 36.Qe5-e1 Rd8-c8 37.Bb4-c3 Ra2-c2 38.Bc3-d2 Rc2-a2 39.Kg1-f1 Rc8-c2 40.Bd2-f4 Kg8-h7 41.h3-h4 Rc2-g2 42.Bf4-e5 Rg2-d2 43.Be5-g3
  =  (0.14)   Depth: 21   00:17:02  16229kN
34.Kg1-f1 Rd8-d7 35.Kf1-e1 Rd7-b7 36.Ke1-d1
  =  (0.16)   Depth: 21   00:26:15  35167kN
34.Kg1-f1 Rd8-d7 35.Kf1-e1 Rd7-b7 36.Ke1-d1 Rc2-f2 37.Kd1-c1 Rf2-f1+ 38.Kc1-c2 Rf1-f2+ 39.Kc2-c3 Rf2xf3+ 40.Kc3-c4 Rf3-f5 41.Qe5-e4 Rf5-d5 42.Bd6-b4 Rb7-c7+ 43.Kc4-b3 Rc7-c8 44.Bb4-c3 Rc8-b8+ 45.Kb3-a3 Rb8-c8 46.Bc3-e5 a6-a5 47.Qe4-e3 Rc8-d8 48.Ka3-b2 Rd8-c8
  =  (0.20)   Depth: 22   00:34:40  52790kN
34.Kg1-f1 Rd8-d7 35.Kf1-e1 Rd7-b7 36.Ke1-d1 Rc2-f2 37.Kd1-c1 Rf2-f1+ 38.Kc1-c2 Rf1-f2+ 39.Kc2-c3 Rf2xf3+ 40.Kc3-c4 Rf3-f5 41.Qe5-e4 Rf5-d5 42.Bd6-b4 Rb7-c7+ 43.Kc4-b3 Rc7-c8 44.Bb4-c3 Rc8-b8+ 45.Kb3-a3 Rb8-c8 46.Bc3-e5 Rc8-c5 47.Be5-f6 Rc5-c8 48.h3-h4 a6-a5 49.Qe4-e3
  =  (0.20)   Depth: 23   00:48:53  83154kN
34.Kg1-f1 Rd8-d7 35.Kf1-e1 Rd7-b7 36.Ke1-d1 Rc2-f2 37.Kd1-c1 Rf2-f1+ 38.Kc1-c2 Rf1-f2+ 39.Kc2-c3 Rf2xf3+ 40.Kc3-c4 Rf3-f5 41.Qe5-e4 Rf5-d5 42.Bd6-b4 Rb7-c7+ 43.Kc4-b3 Rc7-c8 44.Bb4-c3 Rc8-b8+ 45.Kb3-a3 Rb8-c8 46.Ka3-b2 Rc8-c5 47.Bc3-f6 Rc5-c8 48.Qe4-e3 Rd5-f5 49.Bf6-c3
  =  (0.20)   Depth: 24   01:16:01  141145kN
34.Kg1-f1 Rd8-d7 35.Kf1-e1 Rd7-b7 36.Ke1-d1 Rc2-f2 37.Kd1-c1 Rf2-f1+ 38.Kc1-c2 Rf1-f2+ 39.Kc2-c3 Rf2xf3+ 40.Kc3-c4 Rf3-f5 41.Qe5-e4 Rf5-d5 42.Bd6-b4 Rb7-b8 43.Bb4-c3 Rb8-c8+ 44.Kc4-b3 Rc8-b8+ 45.Kb3-a3 Rb8-c8 46.Ka3-b2 Rc8-c5 47.Bc3-f6 Kg8-h7 48.Kb2-b3 Rc5-c7
  =  (0.20)   Depth: 25   02:21:41  243867kN
34.Qe5-f4 a6-a5 35.Kg1-f1
  =  (0.24)   Depth: 26   11:20:58  1091027kN

(so k,  06.01.2009)
Parent - - By RangeFinder (**) Date 2009-11-10 07:05 Edited 2009-11-10 07:17
Uri, maybe I do need the whole game.  For your first game my Rybka 3 still gives Rd7 at d=26.  (Deep Rybka 3/ i7 Extreme)

2b2k2/pp2rp2/2p2p1p/6n1/3P3N/P2B2P1/1P3PP1/3R2K1 b - - 0 1


[+0.20]  d=26  1...Rd7 2.Bc2 Rd5 3.f3 f5 4.Kf2 Kg7 5.Rd2 Nh7 6.Re2 Be6 7.Re5 Rxd4 8.Nxf5 Bxf5 9.Bxf5 Nf6 10.Ke2 Rd5 11.Rxd5 Nxd5 12.Kd3 Kf6 13.Bc8 b6 14.Ke4 (0:23:50) 276288kN
[+0.22]  d=25  1...Rd7 2.Bc2 Rd5 3.f3 f5 4.Kf2 Kg7 5.b4 Kf6 6.Ke3 Rd8 7.Re1 h5 8.Rh1 Re8 9.Kf2 Rd8 10.Rd1 b6 11.Ke3 (0:16:12) 184310kN
[+0.24]  d=24  1...Rd7 2.Bc2 Rd5 3.f3 f5 4.Kf2 Kg7 5.b4 Kf6 6.Ke3 Rd8 7.Re1 h5 8.Bd3 Ne6 9.Nxf5 Nc7 10.Nh4 (0:12:28) 142152kN
[+0.24]  d=23  1...Rd7 2.Bc2 Rd5 3.f3 f5 4.Kf2 Kg7 5.b4 Kf6 6.Ke3 Rd8 7.Re1 h5 8.Bd3 Ne6 9.Nxf5 Nc7 10.Nh4 Ne6 11.Rc1 (0:04:17) 48456kN
[+0.18]  d=22  1...Rd7 2.Bb1 Rd8 3.f3 Ne6 4.Nf5 h5 5.Kf2 Nc7 6.Ne3 Ke7 7.Ke2 Be6 8.Bd3 Nd5 9.Rh1 Nxe3 10.Kxe3 Rd5 11.Be4 Rb5 12.b4 Rg5 (0:02:14) 25324kN
[+0.16]  d=21  1...Rd7 2.Bc2 Rd5 3.Kf1 Ne6 4.Nf5 Nc7 5.Ne3 Rb5 6.b4 Rh5 7.Ke2 Nb5 8.Rd3 Be6 9.a4 Nd6 10.Bb3 Ne4 11.g4 Rg5 (0:00:44) 8839kN
[+0.16]  d=20  1...Rd7 2.Bc2 Rd5 3.Kf1 Ne6 4.Nf5 Nc7 5.Ne3 Rb5 6.b4 Rh5 7.Ke2 Nb5 8.Rd3 Be6 9.a4 Nd6 10.Bb3 Ne4 11.g4 Rg5 (0:00:32) 6527kN
[+0.17]  d=19  1...Rd7 2.Bc2 Ne6 3.Nf5 Rd5 4.Kf1 Nc7 5.Ne3 Rb5 6.b4 Rh5 7.Ke2 Nb5 8.Rd3 Be6 9.a4 Nd6 10.Bb3 Bxb3 (0:00:13) 2822kN
[+0.15]  d=18  1...Rd7 2.Bc2 Ne6 3.Nf5 Rd5 4.Kf1 Nc7 5.Ne3 Rb5 6.b4 Rh5 7.Ke2 Nb5 8.Rd3 Be6 9.a4 Nd6 (0:00:09) 1940kN
[+0.16]  d=17  1...Rd7 2.Bc2 Ne6 3.Nf5 Rd5 4.Kf1 Nc7 5.Ne3 Rb5 6.b4 Rh5 7.Ke2 Nb5 8.Rd3 Be6 (0:00:06) 1272kN
[+0.16]  d=16  1...Rd7 2.Bc2 Ne6 3.Nf5 Rd5 4.Kf1 Nc7 5.Ne3 Rb5 6.b4 Rh5 7.Ke2 Nb5 8.Rd3 Be6 (0:00:05) 1011kN
[+0.23]  d=15  1...Rd7 2.Bc2 Ne6 3.Nf5 Rd5 4.Kf1 Nc7 5.Ne3 Rb5 6.b4 Rh5 7.Bd3 Be6 8.Ke2 (0:00:03) 691kN
[+0.24]  d=14  1...Rd7 2.Bc2 Rd8 3.f3 Ne6 4.Nf5 h5 5.Kf2 Nc7 6.Rh1 Bxf5 7.Bxf5 Rxd4 8.Ke3 (0:00:02) 382kN
[+0.24]  d=13  1...Rd7 2.Bc2 Rd8 3.f3 Ne6 4.Nf5 h5 5.Kf2 Nc7 6.Rh1 Bxf5 7.Bxf5 Rxd4 8.Ke3 (0:00:01) 276kN
[+0.22]  d=12  1...Rd7 2.Bc2 Rd8 3.f3 Kg7 4.Kf2 Be6 5.Ke3 Re8 (0:00:00) 149kN
[+0.24]  d=11  1...Rd7 2.Bc2 Rd8 3.f3 Kg7 4.Kf2 b6 5.Ke3 (0:00:00) 103kN
[+0.24]  d=10  1...Rd7 2.Bc2 Rd8 3.f3 Kg7 4.Kf2 b6 5.Ke3 (0:00:00) 74kN
[+0.21]  d=9  1...Rd7 2.Bc2 Re7 3.Kf1 Be6 4.Nf5 (0:00:00) 52kN
[+0.20]  d=8  1...Rd7 2.Bc2 Rd5 3.f3 Rb5 (0:00:00) 42kN
[+0.24]  d=8  1...Re8 2.f3 Rd8 3.Bc2 Kg7 4.Kf2 b6 5.Ke3 (0:00:00) 35kN

  IDeA gave Rd7 and Re8 an equal evaluation of +.22 after just 6  minutes of calculation on my machine.  (Rybka 3, 10s and d=16, v=5)  Not many positions saved to the tree after 6 minutes of course, but I like that it calls my attention to the possible move right away.  (I might let this position sit over night to see what comes of it.  :-))
Attachment: BlassGonzalezMove35.pgn - IDeA_Analysis (71k)
Parent - By Uri Blass (*****) Date 2009-11-10 07:24
Here is the all game

http://www.iccf-webchess.com/MakeAMove.aspx?id=190489

My opponent played 35...Rd7 and it was a draw
I do not claim that 35...Re8 is better but only that rybka3 1 cpu with 256 mbytes suggested this move at depth 23 and does not suggest it earlier.

It was a bad game of me.
I did not always followed rybka's moves but analysis suggested that rybka's moves also did not give me practical chances to win.

I guess that my main mistake was 4.Nc4 and inspite of the fact that rybka chose this move in the world championship it is not the way to play for a win with white in a correspondence game.

Maybe I have more mistakes.

I believe that I used more computer time than my opponent but I simply do not know how to play for a win.

Uri
Parent - - By RangeFinder (**) Date 2009-11-10 15:52
I suppose the IDeA analysis basically supports what Vytron said.  :-p

"What he said!"
Parent - By RangeFinder (**) Date 2009-11-10 17:17
--Interestingly, my Rybka doesn't give Qf4 on your second game either.  (Qf4 seems to be a close second though.)  All my Rybka engine settings are defaults. 

3r2k1/5p2/p2Bp1p1/4Q2p/P7/5P1P/2r5/6K1 w - h6 0 1


[+0.30]  d=27  1.Kf1 Rd7 2.Ke1 Rb7 3.Kd1 Rf2 4.Kc1 Rf1 5.Kc2 Rf2 6.Kc3 Rxf3 7.Kc4 Rf5 8.Qe4 Rd5 9.Bb4 a5 10.Bc3 Rc7 11.Kb3 Rcc5 12.Bf6 Rc8 13.Qf3 Rb8 14.Ka3 Rc8 15.Qb3 Rdc5 16.Qb7 (0:37:34) 450778kN
[+0.18]  d=26  1.Kf1 Rd7 2.Ke1 Rb7 3.Kd1 Rf2 4.Kc1 Rf1 5.Kc2 Rf2 6.Kc3 Rxf3 7.Kc4 Rf5 8.Qe4 Rd5 9.Bb4 a5 10.Bc3 Rc7 11.Kb3 Rcc5 12.Bf6 Kh7 13.Qe3 Rc8 14.Qa7 Kg8 15.h4 Rd3 16.Kb2 (0:18:21) 224062kN
[+0.18]  d=25  1.Kf1 Rd7 2.Ke1 Rb7 3.Kd1 Rf2 4.Kc1 Rf1 5.Kc2 Rf2 6.Kc3 Rxf3 7.Kc4 Rf5 8.Qe4 Rd5 9.Bb4 a5 10.Bc3 Rc7 11.Kb3 Rcc5 12.Bf6 Kh7 13.Qe3 Rc8 14.Qa7 Kg8 15.h4 Rd3 16.Kb2 (0:10:17) 121872kN
[+0.18]  d=24  1.Kf1 Rd7 2.Ke1 Rb7 3.Kd1 Rf2 4.Kc1 Rf1 5.Kc2 Rf2 6.Kc3 Rxf3 7.Kc4 Rf5 8.Qe4 Rd5 9.Bb4 a5 10.Bc3 Rc7 11.Kb3 Rcc5 12.Bd4 Rc7 13.Be5 Rcc5 14.Bd4 Rc7 15.Be5 Rcc5 16.Bd4 (0:06:30) 77686kN
[+0.17]  d=23  1.Kf1 Rd7 2.Ke1 Rb7 3.Kd1 Rf2 4.Kc1 Rf1 5.Kc2 Rf2 6.Kc3 Rxf3 7.Kc4 Rf5 8.Qe4 Rd5 9.Bb4 a5 10.Bc3 Rc7 11.Kb3 Rb7 12.Ka2 Rc7 13.Bb2 Rcc5 14.Kb3 (0:03:34) 44320kN
[+0.16]  d=22  1.Kf1 Rd7 2.Ke1 Rb7 3.Kd1 Rf2 4.Kc1 Rf1 5.Kc2 Rf2 6.Kc3 Rxf3 7.Kc4 Rf5 8.Qe4 Rd5 9.Bb4 a5 10.Bc3 Rc7 11.Kb3 Rb7 12.Ka2 Rc7 13.Bb2 Rcc5 14.Kb3 (0:02:02) 25621kN
[+0.16]  d=21  1.Kf1 Rd7 2.Ke1 (0:01:33) 19911kN
[+0.13]  d=21  1.a5 Rd2 2.Bb4 Ra2 3.Qe1 Rc8 4.Bc3 Rc2 5.Bd2 Ra2 6.Kf1 Rc4 7.Be3 Kh7 8.Bg5 Rcc2 9.Bf4 (0:00:39) 8784kN
[+0.16]  d=20  1.a5 Rd2 2.Bb4 Ra2 3.Qe1 Rc8 4.Bc3 Rc2 5.Bd2 Ra2 6.Kf1 Rc4 7.Be3 Kh7 8.Bg5 Rcc2 9.Bf4 (0:00:25) 5717kN
[+0.16]  d=19  1.a5 Rd2 2.Bb4 Ra2 3.Qe1 Rc8 4.Bc3 Rc2 5.Bd2 Ra2 6.Bf4 Rcc2 7.Kf1 Rc5 8.Qb1 Raxa5 (0:00:15) 3435kN
[+0.22]  d=18  1.a5 Rd2 2.Bc5 Rc8 3.Qe1 Rd5 4.Bb4 Rc2 5.h4 Rb2 6.Bc3 Rc2 7.Bf6 Rdd2 8.Be5 Re2 (0:00:06) 1380kN
[+0.22]  d=17  1.a5 Rd2 2.Bc5 Rc8 3.Qe1 Rd5 4.Bb4 Rc2 5.h4 Rb2 6.Bc3 Rc2 7.Be5 Rdd2 8.Kf1 Kh7 9.f4 (0:00:04) 896kN
[+0.26]  d=16  1.a5 Rd2 2.Bc5 Rc8 3.Qe1 Rd5 4.Bb4 Rc2 5.h4 Rb2 6.Bc3 Rc2 7.Be5 Rdd2 8.Qb1 (0:00:02) 528kN
[+0.26]  d=15  1.a5 Rd2 2.Bc5 Rc8 3.Qe1 Rd5 4.Bb4 Rc2 5.h4 Rb2 6.Bc3 Rc2 7.Be5 Rdd2 8.Qb1 (0:00:01) 410kN
[+0.26]  d=14  1.a5 Rd2 2.Bc5 Rc8 3.Qe1 Rd5 4.Bb4 Rc2 5.h4 Rb2 6.Bc3 Rc2 7.Be5 Rdd2 (0:00:01) 322kN
[+0.26]  d=13  1.a5 Rd2 2.Bc5 Rc8 (0:00:01) 242kN
[+0.26]  d=12  1.a5 Rdc8 2.Bb4 Rd8 3.Qa1 Rd5 4.h4 Re2 5.Qb1 Kh7 6.Qc1 (0:00:00) 149kN
[+0.26]  d=11  1.a5 Rdc8 2.Bb4 Rd8 3.Qa1 Rd5 4.h4 Re2 5.Qb1 Kh7 6.Qc1 (0:00:00) 149kN
[+0.25]  d=11  1.Qf4 a5 2.Qe5 Kh7 3.Qf6 Rd7 4.Kf1 Ra2 (0:00:00) 78kN
[+0.43]  d=10  1.Qf4 Rdc8 2.Qe3 Rc1 3.Kf2 R1c2 4.Kg3 R2c4 5.Qb3 (0:00:00) 35kN

Of course, these aren't early middle game positions like HartRook was referencing.  (Would take my computer much longer to calculate a depth of say 23 in complex early middle game position.)  Still I'm surprised that your Rybka finds new moves where mine is seems to not.  Different trees as you alluded to maybe.
Parent - By Uri Blass (*****) Date 2009-11-10 10:42 Edited 2009-11-10 10:45
Here are  more cases when Rybka changed her mind at high depth(this time rybka 4 cpu)
I did not post all the cases that I have:

Rybka needed depth 24 to find the theory move b6

The second position is from the following game
http://www.iccf-webchess.com/MakeAMove.aspx?id=190499

FEN:
rnbqkb1r/pppp1ppp/4pn2/8/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq - 1 3


Rybka 3 32-bit:
   2  00:00            52  53.248  -0.13  Nb8c6
   3  00:00           499  510.976  -0.22  Nb8c6
   4  00:00         1.178  70.957  -0.25  Nb8c6
   4  00:00         2.498  77.513  -0.12  c7c5
   4  00:00         2.521  78.227  -0.09  Bf8b4+
   5  00:01         4.409  94.058  -0.16  Bf8b4+ Nb1c3 00
   5  00:01         6.996  90.682  -0.09  Bf8d6 c4c5
   5  00:01         8.193  66.584  +0.03  Bf8e7 Nb1c3 00
   6  00:01         8.749  71.102  +0.04  Bf8e7 Nb1c3 00
   7  00:01        12.956  76.687  -0.12  Bf8e7 Nb1c3 00 e2e3 d7d5
   8  00:01        32.327  78.257  -0.12  Bf8e7 Nb1c3 00 e2e3 d7d5
   9  00:01        47.483  79.709  -0.07  Bf8e7 Nb1c3 00 e2e3 d7d5 c4xd5
  10  00:01        72.491  79.221  -0.09  Bf8e7 Nb1c3 00 e2e3 d7d5 c4xd5 Nf6xd5 Bf1d3
  11  00:02       131.130  77.482  -0.11  Bf8e7 Nb1c3 00 e2e3 Nb8c6 d4d5 Nc6b4 a2a3
  12  00:04       249.486  75.095  -0.16  Bf8e7 Nb1c3 00 e2e3 h7h6 Bf1d3 c7c5 00 Nb8c6 h2h3
  13  00:09       693.759  78.230  -0.15  Bf8e7 Nb1c3 00 e2e3 h7h6 Bf1d3 c7c5 00 Nb8c6 d4xc5 Be7xc5 a2a3 d7d5
  14  00:16     1.220.052  78.510  -0.15  Bf8e7 Nb1c3 00 e2e3 h7h6 Bf1d3 c7c5 00 Nb8c6 d4xc5 Be7xc5 a2a3 d7d5
  15  00:27     2.196.899  82.776  -0.17  Bf8e7 Nb1c3 d7d5 c4xd5 e6xd5 g2g3 Nb8c6 Bf1g2 00 00 Rf8e8 Nf3e5 Be7d6 f2f4 Nc6e7
  16  00:56     4.288.340  79.334  -0.17  Bf8e7 Nb1c3 d7d5 c4xd5 e6xd5 g2g3 Nb8c6 Bf1g2 00 00 Rf8e8 Nf3e5 Be7d6 f2f4 Nc6e7
  16  01:40     8.222.751  84.045  -0.16  d7d5 Nb1c3 Nb8c6 e2e3 Bf8d6 Bf1d3 00 00 d5xc4 Bd3xc4 a7a6 h2h3 h7h6 a2a3
  17  03:17    16.086.800  83.857  -0.17  d7d5 Nb1c3 Bf8e7 c4xd5 e6xd5 g2g3 Nb8c6 Bf1g2 00 00 Rf8e8 Nf3e5 Be7d6 f2f4 Nc6e7
  18  05:26    27.312.697  85.768  -0.21  d7d5 Nb1c3 Bf8e7 c4xd5 e6xd5 Bc1f4 00 e2e3 Nf6h5 Bf4e5 f7f6 Be5g3 Bc8e6 Qd1b3 b7b6 Qb3a4 Nh5xg3 h2xg3 Be6f5 Rh1h5
  18  12:12    62.150.044  87.002  -0.11  c7c5 d4d5 b7b5 e2e4 Nf6xe4 Bf1d3 Ne4d6 d5xe6 d7xe6 c4xb5 c5c4 Bd3c2 a7a6 b5xa6 Nb8xa6 00 Na6b4 Bc1f4 Nb4d3 Bc2xd3 c4xd3 Nb1c3 f7f6 Qd1xd3 Bc8a6 Qd3e3
  19  13:56    71.580.851  87.722  -0.11  c7c5 d4d5 b7b5 e2e4 Nf6xe4 Bf1d3 Ne4d6 d5xe6 d7xe6 c4xb5 c5c4 Bd3e2 Qd8a5+ Qd1d2 Qa5xb5 00 Nb8c6 Nb1a3 Qb5c5 Qd2c3 Bc8a6 Bc1e3 Qc5b4
  20  20:05   104.196.763  88.573  -0.13  c7c5 d4d5 b7b5 e2e4 Nf6xe4 Bf1d3 Ne4d6 c4xb5 c5c4 Bd3e2 Qd8a5+ Qd1d2 Qa5xb5 Nb1c3
  21  30:48   159.511.521  88.422  -0.13  c7c5 d4d5 b7b5 e2e4 Nf6xe4 Bf1d3 Ne4d6 c4xb5 c5c4 Bd3e2 Qd8a5+ Qd1d2 Qa5xb5 Nb1c3
  22  2:24:22   779.810.462  92.189  -0.20  c7c5 d4d5 b7b5 Bc1g5 e6xd5 c4xd5 h7h6 Bg5xf6 Qd8xf6 Qd1c2 Nb8a6 Nb1c3
  23  8:01:09  2.579.691,331  91.505  -0.24  c7c5 d4d5 b7b5 Bc1f4 b5xc4 Nb1c3 Qd8a5 Bf4d2
  23  13:26:08  4.373.588,808  92.594  -0.20  Bf8b4+ Bc1d2 Qd8e7 g2g3 Bb4xd2+ Qd1xd2 Nb8c6 e2e3 00 Bf1g2 Qe7b4 Nf3e5 Qb4xd2+ Ke1xd2 Ra8b8 Nb1c3 d7d6 Ne5xc6 b7xc6 b2b3 Bc8b7 h2h3 Rf8e8
  24  15:05:04  4.912.752,992  92.640  -0.18  Bf8b4+ Bc1d2 Qd8e7 e2e3 00 Bf1e2 b7b6 Bd2xb4 Qe7xb4+ Qd1d2 Qb4xd2+
  24  18:06:52  5.892.385,995  92.525  -0.17  b7b6 g2g3 Bc8b7 Bf1g2 c7c5 Nb1c3 c5xd4 Qd1xd4 Nb8c6 Qd4f4 Bf8c5 Bc1e3 00 Ra1d1 Bc5b4 Be3d2 Nc6e7
  25  27:16:21  8.898.096,356  92.804  -0.19  b7b6 a2a3 Bc8a6 Qd1c2 Ba6b7 Nb1c3 c7c5 d4xc5 b6xc5 Bc1f4 Qd8b6 Ra1d1 Bb7xf3 g2xf3 Nb8c6 Nc3b5 Ra8c8 e2e3 a7a6 Nb5d6+ Bf8xd6 Rd1xd6 Qb6b7 Rd6d3 Nc6e7 Bf1g2
  26  45:49:18  15.083.545,825  93.633  -0.13  b7b6 a2a3 Bc8b7 Nb1c3 d7d5 Bc1g5 Bf8e7 Qd1a4+ Nb8d7 Bg5xf6 Be7xf6 c4xd5 e6xd5 g2g3 c7c5 Bf1h3 c5xd4 Nf3xd4 00 Bh3xd7 Bf6xd4 Qa4xd4 Qd8xd7 00 Qd7e6 Ra1d1 Ra8c8 e2e3 f7f5 Qd4d3
  27  58:08:20  19.260.493,933  94.232  -0.14  b7b6 a2a3 Bc8b7 Nb1c3 d7d5 Bc1g5 Bf8e7 Qd1a4+ Nb8d7 Bg5xf6 Be7xf6 c4xd5 e6xd5 g2g3 c7c5 Bf1h3 Qd8c8 00 Qc8c6 Qa4xc6 Bb7xc6 Rf1d1 Ra8d8 a3a4 a7a5 Bh3f1 00

Rybka needed depth 24 to suggest g3(not sure if g3 is the best move but it is another question and I played g3)

Rybka 3 w32:
   2  00:00           638  653.312  +0.46  Be2g4
   2  00:00           716  733.184  +0.63  b2b4
   3  00:00           869  889.856  +0.53  b2b4
   4  00:00         2.033  122.458  +0.58  b2b4
   5  00:00         3.102  99.264  +0.48  b2b4 Bg5f4
   6  00:00         5.840  93.440  +0.51  b2b4 Bg5f4 g2g3 Bf4xc1
   7  00:00         7.459  96.683  +0.51  b2b4 Bg5f4 g2g3 Bf4xc1
   8  00:00        14.205  92.649  +0.53  b2b4 Bg5f4 g2g3 Bf4xc1 Rf1xc1 Ne8f6
   9  00:00        30.222  109.742  +0.53  b2b4 Bg5f4 g2g3 Bf4xc1 Rf1xc1 Ne8f6 Qd3e3
  10  00:01        67.003  115.506  +0.56  b2b4 Bg5f4 g2g3 Bf4xc1 Rf1xc1 Ne8f6 Qd3e3 Rc8c7
  11  00:01       122.028  115.915  +0.57  b2b4 Bg5f4 g2g3 Bf4xc1 Rf1xc1 Ne8f6 Nc4e3 Rc8xc3 Rc1xc3 Qe7d8 Qd3b1 Qd8e7
  12  00:02       245.849  122.208  +0.57  b2b4 Bg5xc1 Rf1xc1 Ne8f6 g2g3 Rf8e8 Qd3e3 Re8f8 Kg1g2 Kg8g7
  13  00:03       378.337  127.314  +0.58  b2b4 Bg5xc1 Rf1xc1 Ne8f6 g2g3 Rf8d8 Qd3e3 Kg8g7 Kg1g2 h7h6 Nc4d2
  14  00:09     1.130.779  127.523  +0.59  b2b4 Bg5xc1 Rf1xc1 Ne8f6 g2g3 Rf8d8 Qd3e3 Kg8g7 Kg1g2 h7h6 Nc4d2 Rc8xc3 Qe3xc3 Nd7f8
  15  00:18     2.243.939  131.152  +0.59  b2b4 Bg5xc1 Rf1xc1 Ne8f6 g2g3 Rf8d8 Qd3e3 Kg8g7 Kg1g2 h7h6 Nc4d2 Rc8xc3 Qe3xc3 Rd8g8 Qc3c7
  16  00:25     3.092.005  129.101  +0.59  b2b4 Bg5xc1 Rf1xc1 Ne8f6 g2g3 Rf8d8 Qd3e3 Kg8g7 Kg1g2 h7h6 Nc4d2 Rc8xc3 Qe3xc3 Rd8g8 Qc3c7
  17  00:46     5.801.291  128.169  +0.59  b2b4 Bg5xc1 Rf1xc1 Ne8f6 g2g3 Rf8d8 Qd3e3 Kg8g7 Kg1g2 h7h6 Nc4d2 Rc8xc3 Qe3xc3 Rd8g8 Qc3c7 Rg8b8 h2h3 Nf6e8
  18  01:19     9.818.392  127.114  +0.59  b2b4 Bg5xc1 Rf1xc1 Ne8f6 g2g3 Rf8d8 Nc4d2 Qe7f8 Kg1g2 Rc8xc3 Qd3xc3 Rd8b8 Qc3c7 Qf8e7 h2h3 Nf6e8 Qc7c2 Ne8f6 Qc2c3
  19  02:28    18.589.725  128.404  +0.59  b2b4 Bg5xc1 Rf1xc1 Ne8f6 g2g3 Rf8d8 Nc4d2 Qe7f8 Kg1g2 Rc8xc3 Qd3xc3 Rd8b8 Qc3c7 Qf8e7 h2h3 Nf6e8 Qc7c2 Ne8f6 Qc2c3
  20  05:27    40.741.432  127.632  +0.59  b2b4 Bg5xc1 Rf1xc1 Ne8f6 g2g3 Rf8d8 Nc4d2 Qe7f8 Kg1g2 Rc8xc3 Qd3xc3 Rd8b8 Qc3c7 Qf8e7 h2h3 Nf6e8 Qc7c2 Ne8f6 Qc2c3
  21  10:53    79.165.334  124.245  +0.59  b2b4 Bg5xc1 Rf1xc1 Ne8f6 g2g3 Rc8c7 Nc4d2 Rc7xc3 Qd3xc3 Rf8b8 Kg1g2 Qe7f8 Qc3c7 Qf8e7 h2h3 Nf6e8 Qc7c2 Ne8f6 Qc2c3
  22  39:04   284.661.058  124.359  +0.60  b2b4 Bg5xc1 Rf1xc1 Ne8f6 g2g3 Rc8c7 Nc4d2 Rc7xc3 Qd3xc3 Rf8b8 Be2f1 Nf6e8 Bf1h3 Qe7d8 Kg1g2 Nd7f6 f2f3 Nf6d7 Nd2f1 Qd8e7 Nf1e3
  23  51:08   379.567.035  126.677  +0.60  b2b4 Bg5xc1 Rf1xc1 Ne8f6 g2g3 Rc8c7 Nc4d2 Rc7xc3 Qd3xc3 Rf8b8 Be2f1 Nf6e8 Bf1h3 Kg8g7 Qc3e3 Qe7d8 Nd2c4 Nd7f6
  24  3:16:26  1.461.719.583  126.995  +0.61  b2b4 Bg5xc1 Rf1xc1 Ne8f6 g2g3 Rc8c7 Nc4d2 Rc7xc3 Qd3xc3 Rf8b8 Be2f1 Nf6e8 Bf1h3 Kg8g7 f2f3 Rb8a8 Nd2c4 Ne8f6 Nc4e3 Nf6e8 Kg1g2
  24  14:47:45  6.351.112,352  122.091  +0.64  g2g3 Bg5xc1 Rf1xc1 Ne8f6 f2f3 h7h5 Qd3d2 Rc8c7 Be2f1 h5h4 g3xh4 Nf6h5 Qd2g5 Nd7f6 Rc1c2 Rf8e8 Bf1h3 Re8f8 Bh3g2 Kg8h7 Rc2c1 Nh5f4 Bg2f1
Up Topic Rybka Support & Discussion / Rybka Discussion / Quality of Rybka 3 (1-sigma-zero versus move count (d=xx)

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