TEST position TCEC5- Houdini 1.03a-DRybka4 1-0

[beram]

This Semi-slav opening position arose in Houdini 1.03a – DeepRybka4 64 in the TCEC5 tournament
[D] r1b2rk1/2qn1ppp/p1p1pn2/1p4N1/3PP3/2N5/PPQ1BPPb/R1B2R1K b - - 0 13

Most programs favor 13. ..c5 as best for black. Rybka in stead played h6 at depth 20
After the moves 14. Nf3 – Bf4 15 e5 – Bxc1 16 Raxc1 – Ne8 17 Ne4 black wasn’t able to play for the c5 break anymore. And despite his material plus, he was gradually being outplayed because of the well known badly placed c8-bishop.
The difference in evals between the two programs (despite being regarded so closely related… ) where for a long time (moves13-43) very big (in the given position -0.14 for black according to Rybka, while 0.30 better for white after 14 Nf3 according to Houdini) this difference in evals continues till move 43 (!) where this position occured

[D] b1qr1rkn/6p1/p1p1p2p/NpNnPp1Q/1P1P1P2/P2R2P1/4B3/6KR b - - 0 42

most programs eval this attacking position for white as very good for white (besides Houdini (+0.82 depth 25),also Stockfish and Fritz12 give more than half a pawn better for white) but after 43. ..Ng6 Rybka at depth 23 still gave only 0.00 !
Just after the next move 44. Rd2 – Rh8 Rybka jumps to +0.30 better for white.

Very nice game for Houdini and badly judged by Rybka. I have examined the special exp61 settings influence in this case, but also the standard Rybka doesn’t judge well enough the real problems for black.

Can anyone explain why Rybka is so poor in these positions ?

Grts Bram

Code: Select all

[Event "TCEC - Tournament 5"]
[Site "www.tcec-chess.org"]
[Date "2010.11.26"]
[Round "8.3"]
[White "Houdini 1.03a 64-bit 6CPU"]
[Black "Rybka 4 Exp-61 64-bit 6CPU"]
[Result "1-0"]
[Time "23:32:53"]
[ECO "D15"]
[Opening "Three Knights Variation, Slav; D15"]
[TimeControl "40/7200:20/3600:900+30"]
[PlyCount "163"]
[Number "24"]
[Termination "GUI adjudication"]
[WhiteType "program"]
[BlackType "program"]
[Variant "normal"]

{ Intel Core i7 980x @ 4303 MHz }
1.d4 { ev=0.00, d=1, mt=00:00:00, tl=02:00:00, s=0 kN/s, tb=0,  }  
d5 { ev=0.00, d=1, mt=00:00:00, tl=02:00:00, s=0 kN/s, tb=0,  }  
2.c4 { ev=0.00, d=1, mt=00:00:00, tl=02:00:00, s=0 kN/s, tb=0,  }  
c6 { ev=0.00, d=1, mt=00:00:00, tl=02:00:00, s=0 kN/s, tb=0,  }  
3.Nf3 { ev=0.00, d=1, mt=00:00:00, tl=02:00:00, s=0 kN/s, tb=0,  }  
Nf6 { ev=0.00, d=1, mt=00:00:00, tl=02:00:00, s=0 kN/s, tb=0,  }  
4.Nc3 { ev=0.00, d=1, mt=00:00:00, tl=02:00:00, s=0 kN/s, tb=0,  }  
e6 { ev=0.00, d=1, mt=00:00:00, tl=02:00:00, s=0 kN/s, tb=0,  }  
5.e3 { ev=0.00, d=1, mt=00:00:00, tl=02:00:00, s=0 kN/s, tb=0,  }  
Nbd7 { ev=0.00, d=1, mt=00:00:00, tl=02:00:00, s=0 kN/s, tb=0,  }  
6.Qc2 { ev=0.00, d=1, mt=00:00:00, tl=02:00:00, s=0 kN/s, tb=0,  }  
Bd6 { ev=0.00, d=1, mt=00:00:00, tl=02:00:00, s=0 kN/s, tb=0,  }  
7.Bd3 { ev=0.00, d=1, mt=00:00:00, tl=02:00:00, s=0 kN/s, tb=0,  }  
O-O { ev=-0.07, d=22, pd=O-O, mt=00:07:29, tl=01:52:30, s=658 kN/s, tb=0,  }  
8.O-O { ev=0.15, d=25, pd=h6, mt=00:04:22, tl=01:55:38, s=16011 kN/s, tb=0,  }  
dxc4 { ev=-0.10, d=22, pd=Bxc4, mt=00:02:24, tl=01:50:07, s=618 kN/s, tb=0,  }  
9.Bxc4 { ev=0.14, d=25, pd=a6, mt=00:07:03, tl=01:48:36, s=16326 kN/s, tb=0,  }  
b5 { ev=-0.10, d=21, pd=Be2, mt=00:05:30, tl=01:44:39, s=665 kN/s, tb=0,  }  
10.Be2 { ev=0.10, d=25, pd=a6, mt=00:03:52, tl=01:44:46, s=16214 kN/s, tb=0,  }  
a6 { ev=-0.11, d=20, pd=Rd1, mt=00:02:18, tl=01:42:23, s=687 kN/s, tb=0,  }  
11.Ng5 { ev=0.12, d=25, pd=Qc7, mt=00:03:12, tl=01:41:36, s=16419 kN/s, tb=0,  }  
Qc7 { ev=-0.12, d=22, pd=e4, mt=00:10:04, tl=01:32:21, s=693 kN/s, tb=0,  }  
12.e4 { ev=0.01, d=26, pd=Bxh2, mt=00:05:12, tl=01:36:25, s=16978 kN/s, tb=0,  }  
Bxh2+ { ev=-0.14, d=22, pd=Kh1, mt=00:02:16, tl=01:30:07, s=711 kN/s, tb=0,  }  
13.Kh1 { ev=0.01, d=24, pd=c5, mt=00:00:00, tl=01:36:27, s=0 kN/s, tb=0,  }  
h6 { ev=-0.14, d=21, pd=Nf3, mt=00:03:50, tl=01:26:19, s=698 kN/s, tb=0,  }  
14.Nf3 { ev=0.30, d=27, pd=Bf4, mt=00:03:47, tl=01:32:42, s=16995 kN/s, tb=0,  }  
Bf4 { ev=-0.10, d=22, pd=e5, mt=00:01:45, tl=01:24:36, s=765 kN/s, tb=0,  }  
15.e5 { ev=0.27, d=26, pd=Bxc1, mt=00:02:45, tl=01:29:59, s=16856 kN/s, tb=0,  }  
Bxc1 { ev=-0.10, d=22, pd=Raxc1, mt=00:01:01, tl=01:23:37, s=731 kN/s, tb=0,  }  
16.Raxc1 { ev=0.28, d=26, pd=Ne8, mt=00:04:16, tl=01:25:44, s=16914 kN/s, tb=0,  }  
Ne8 { ev=-0.15, d=23, pd=Ne4, mt=00:02:59, tl=01:20:40, s=776 kN/s, tb=0,  }  
17.Ne4 { ev=0.26, d=25, pd=f5, mt=00:04:04, tl=01:21:42, s=17068 kN/s, tb=0,  }  
Bb7 { ev=-0.15, d=21, pd=Rfd1, mt=00:04:02, tl=01:16:40, s=732 kN/s, tb=0,  }  
18.Rfd1 { ev=0.23, d=24, pd=c5, mt=00:04:25, tl=01:17:18, s=16731 kN/s, tb=0,  }  
Rd8 { ev=-0.15, d=21, pd=Nfd2, mt=00:03:25, tl=01:13:17, s=734 kN/s, tb=0,  }  
19.Qc3 { ev=0.22, d=25, pd=Qb8, mt=00:03:06, tl=01:14:14, s=16846 kN/s, tb=0,  }  
Qb8 { ev=-0.20, d=21, pd=Ne1, mt=00:04:43, tl=01:08:36, s=711 kN/s, tb=0,  }  
20.Kg1 { ev=0.24, d=25, pd=Nc7, mt=00:02:49, tl=01:11:27, s=16983 kN/s, tb=0,  }  
Nc7 { ev=-0.32, d=21, pd=Bd3, mt=00:03:11, tl=01:05:27, s=710 kN/s, tb=0,  }  
21.Qe1 { ev=0.21, d=26, pd=c5, mt=00:02:41, tl=01:08:47, s=17367 kN/s, tb=0,  }  
Nd5 { ev=-0.30, d=20, pd=Bd3, mt=00:06:00, tl=00:59:28, s=700 kN/s, tb=0,  }  
22.b4 { ev=0.25, d=25, pd=Qc7, mt=00:02:44, tl=01:06:05, s=17065 kN/s, tb=0,  }  
Nf4 { ev=-0.37, d=21, pd=Bf1, mt=00:04:27, tl=00:55:03, s=606 kN/s, tb=0,  }  
23.Bf1 { ev=0.27, d=26, pd=Nb6, mt=00:20:47, tl=00:45:20, s=17379 kN/s, tb=0,  }  
Nb6 { ev=-0.30, d=21, pd=a3, mt=00:02:51, tl=00:52:14, s=582 kN/s, tb=0,  }  
24.a3 { ev=0.30, d=26, pd=Qc7, mt=00:02:12, tl=00:43:10, s=17470 kN/s, tb=0,  }  
Nbd5 { ev=-0.29, d=21, pd=Nfd2, mt=00:02:38, tl=00:49:38, s=577 kN/s, tb=0,  }  
25.Nfd2 { ev=0.39, d=25, pd=Ne7, mt=00:02:20, tl=00:40:52, s=17163 kN/s, tb=0,  }  
Ne7 { ev=-0.25, d=22, pd=Nd6, mt=00:03:06, tl=00:46:35, s=556 kN/s, tb=0,  }  
26.Nb3 { ev=0.37, d=27, pd=c5, mt=00:02:34, tl=00:38:20, s=17790 kN/s, tb=0,  }  
Nf5 { ev=-0.15, d=23, pd=Nec5, mt=00:07:02, tl=00:39:34, s=623 kN/s, tb=0,  }  
27.g3 { ev=0.43, d=26, pd=Nd5, mt=00:02:50, tl=00:35:31, s=17330 kN/s, tb=0,  }  
Nd5 { ev=-0.24, d=23, pd=Bg2, mt=00:02:48, tl=00:36:48, s=649 kN/s, tb=0,  }  
28.Na5 { ev=0.43, d=26, pd=Qc7, mt=00:04:59, tl=00:30:34, s=17149 kN/s, tb=0,  }  
Ba8 { ev=-0.24, d=22, pd=Bh3, mt=00:07:15, tl=00:29:36, s=663 kN/s, tb=0,  }  
29.Nc5 { ev=0.39, d=25, pd=Nb6, mt=00:01:55, tl=00:28:41, s=16865 kN/s, tb=0,  }  
Qc8 { ev=-0.26, d=22, pd=Qe2, mt=00:02:47, tl=00:26:51, s=673 kN/s, tb=0,  }  
30.Qe4 { ev=0.57, d=26, pd=Nb6, mt=00:03:14, tl=00:25:29, s=16802 kN/s, tb=0,  }  
Rfe8 { ev=-0.21, d=23, pd=Bd3, mt=00:07:33, tl=00:19:20, s=718 kN/s, tb=0,  }  
31.Rd3 { ev=0.56, d=24, pd=Rf8, mt=00:02:50, tl=00:22:41, s=16747 kN/s, tb=0,  }  
Nb6 { ev=-0.21, d=23, pd=Qf4, mt=00:03:43, tl=00:15:39, s=729 kN/s, tb=0,  }  
32.Qf4 { ev=0.54, d=25, pd=Rf8, mt=00:02:45, tl=00:19:58, s=16874 kN/s, tb=0,  }  
Rf8 { ev=-0.20, d=22, pd=Qg4, mt=00:02:05, tl=00:13:36, s=702 kN/s, tb=0,  }  
33.Bh3 { ev=0.54, d=25, pd=Nd5, mt=00:02:54, tl=00:17:06, s=17210 kN/s, tb=0,  }  
Nd5 { ev=-0.13, d=21, pd=Qd2, mt=00:02:03, tl=00:11:35, s=749 kN/s, tb=0,  }  
34.Qe4 { ev=0.56, d=26, pd=Nb6, mt=00:04:16, tl=00:12:51, s=16681 kN/s, tb=0,  }  
Nde7 { ev=-0.13, d=21, pd=Qf4, mt=00:01:29, tl=00:10:08, s=722 kN/s, tb=0,  }  
35.Kh2 { ev=0.59, d=25, pd=Nd5, mt=00:03:02, tl=00:09:51, s=17099 kN/s, tb=0,  }  
Kh8 { ev=-0.12, d=20, pd=Kg1, mt=00:02:15, tl=00:07:55, s=658 kN/s, tb=0,  }  
36.Rh1 { ev=0.72, d=24, pd=Kg8, mt=00:02:29, tl=00:07:24, s=16391 kN/s, tb=0,  }  
Nd5 { ev=-0.15, d=20, pd=g4, mt=00:01:44, tl=00:06:13, s=718 kN/s, tb=0,  }  
37.Kg1 { ev=0.76, d=25, pd=Kg8, mt=00:01:53, tl=00:05:34, s=16339 kN/s, tb=0,  }  
Kg8 { ev=0.00, d=21, pd=g4, mt=00:01:32, tl=00:04:43, s=670 kN/s, tb=0,  }  
38.Bf1 { ev=0.72, d=25, pd=Nfe7, mt=00:01:34, tl=00:04:02, s=16530 kN/s, tb=0,  }  
Nfe7 { ev=-0.17, d=21, pd=Bg2, mt=00:00:49, tl=00:03:56, s=735 kN/s, tb=0,  }  
39.Be2 { ev=0.74, d=25, pd=f6, mt=00:01:42, tl=00:02:21, s=16813 kN/s, tb=0,  }  
f5 { ev=-0.16, d=21, pd=exf6, mt=00:00:58, tl=00:02:59, s=729 kN/s, tb=0,  }  
40.Qh4 { ev=0.87, d=27, pd=Ng6, mt=00:02:19, tl=00:00:04, s=17041 kN/s, tb=0,  }  
Ng6 { ev=-0.19, d=22, pd=Qh2, mt=00:01:29, tl=00:01:32, s=726 kN/s, tb=0,  }  
41.Qh5 { ev=0.85, d=25, pd=Kh7, mt=00:05:14, tl=00:54:53, s=16247 kN/s, tb=0,  }  
Nh8 { ev=0.00, d=21, pd=Bf3, mt=00:04:39, tl=00:56:55, s=771 kN/s, tb=0,  }  
42.f4 { ev=0.82, d=25, pd=Rde8, mt=00:02:56, tl=00:51:59, s=16206 kN/s, tb=0,  }  
Kh7 { ev=0.00, d=23, pd=Rd2, mt=00:14:37, tl=00:42:20, s=738 kN/s, tb=0,  }  
43.Bf3 { ev=0.82, d=25, pd=Rde8, mt=00:02:11, tl=00:49:50, s=16456 kN/s, tb=0,  }  
Ng6 { ev=0.00, d=23, pd=Rd2, mt=00:12:43, tl=00:29:39, s=708 kN/s, tb=0,  }  
44.Rd2 { ev=1.00, d=25, pd=Rf7, mt=00:02:16, tl=00:47:36, s=16934 kN/s, tb=0,  }  
Rh8 { ev=0.30, d=23, pd=Rdh2, mt=00:00:59, tl=00:28:42, s=764 kN/s, tb=0,  }  
45.Rdh2 { ev=1.07, d=24, pd=Rdf8, mt=00:02:14, tl=00:45:24, s=16888 kN/s, tb=0,  }  
Nde7 { ev=0.35, d=22, pd=Nab3, mt=00:00:55, tl=00:27:50, s=707 kN/s, tb=0,  }  
46.Nab3 { ev=1.02, d=24, pd=Kg8, mt=00:02:19, tl=00:43:07, s=16164 kN/s, tb=0,  }  
Kg8 { ev=0.35, d=21, pd=Rc2, mt=00:01:13, tl=00:26:38, s=740 kN/s, tb=0,  }  
47.Rc2 { ev=1.00, d=24, pd=Rh7, mt=00:03:20, tl=00:39:48, s=16002 kN/s, tb=0,  }  
Nf8 { ev=0.41, d=21, pd=g4, mt=00:02:44, tl=00:23:56, s=727 kN/s, tb=1,  }  
48.g4 { ev=1.11, d=25, pd=Qc7, mt=00:02:23, tl=00:37:28, s=16630 kN/s, tb=0,  }  
Nfg6 { ev=0.41, d=19, pd=gxf5, mt=00:02:29, tl=00:21:29, s=721 kN/s, tb=0,  }  
49.Qh2 { ev=1.68, d=25, pd=Rh7, mt=00:02:41, tl=00:34:48, s=16331 kN/s, tb=0,  }  
Rf8 { ev=0.85, d=20, pd=Rf2, mt=00:02:39, tl=00:18:52, s=725 kN/s, tb=0,  }  
50.Rf2 { ev=1.94, d=26, pd=Rf7, mt=00:11:10, tl=00:23:40, s=16870 kN/s, tb=0,  }  
Rf7 { ev=0.94, d=19, pd=gxf5, mt=00:01:30, tl=00:17:23, s=673 kN/s, tb=0,  }  
51.gxf5 { ev=1.94, d=24, pd=Rxf5, mt=00:00:01, tl=00:23:42, s=11096 kN/s, tb=0,  }  
Nxf5 { ev=0.94, d=19, pd=Bh5, mt=00:04:19, tl=00:13:07, s=768 kN/s, tb=0,  }  
52.Bh5 { ev=2.13, d=25, pd=Nge7, mt=00:03:20, tl=00:20:23, s=16417 kN/s, tb=0,  }  
Nge7 { ev=0.94, d=18, pd=Bxf7, mt=00:03:38, tl=00:09:30, s=696 kN/s, tb=0,  }  
53.Bxf7+ { ev=2.13, d=23, pd=Kxf7, mt=00:00:00, tl=00:20:25, s=3061 kN/s, tb=0,  }  
Kxf7 { ev=0.94, d=18, pd=Qh5, mt=00:00:07, tl=00:09:25, s=691 kN/s, tb=0,  }  
54.Qh5+ { ev=1.95, d=24, pd=g6, mt=00:03:35, tl=00:16:53, s=16943 kN/s, tb=0,  }  
g6 { ev=1.33, d=21, pd=Qg4, mt=00:02:41, tl=00:06:46, s=716 kN/s, tb=0,  }  
55.Qg4 { ev=2.19, d=24, pd=Qb8, mt=00:06:04, tl=00:10:51, s=16781 kN/s, tb=0,  }  
Nd5 { ev=1.33, d=21, pd=Nd2, mt=00:01:58, tl=00:04:50, s=633 kN/s, tb=0,  }  
56.Nd2 { ev=2.47, d=24, pd=h5, mt=00:01:56, tl=00:08:57, s=16260 kN/s, tb=0,  }  
h5 { ev=1.33, d=19, pd=Qh3, mt=00:01:27, tl=00:03:25, s=702 kN/s, tb=0,  }  
57.Qh3 { ev=2.48, d=24, pd=Ke7, mt=00:01:44, tl=00:07:15, s=16639 kN/s, tb=0,  }  
Qe8 { ev=1.68, d=19, pd=Nde4, mt=00:01:14, tl=00:02:13, s=704 kN/s, tb=0,  }  
58.Nde4 { ev=2.19, d=24, pd=Qe7, mt=00:02:17, tl=00:05:00, s=16975 kN/s, tb=0,  }  
Qe7 { ev=1.61, d=19, pd=Ng5, mt=00:00:52, tl=00:01:23, s=781 kN/s, tb=0,  }  
59.Ng5+ { ev=2.39, d=24, pd=Ke8, mt=00:01:52, tl=00:03:10, s=17533 kN/s, tb=0,  }  
Ke8 { ev=1.68, d=20, pd=Qg2, mt=00:00:27, tl=00:00:58, s=785 kN/s, tb=0,  }  
60.Ngxe6 { ev=2.51, d=25, pd=Bb7, mt=00:03:09, tl=00:00:02, s=18006 kN/s, tb=0,  }  
Bb7 { ev=1.68, d=19, pd=Qg2, mt=00:00:16, tl=00:00:44, s=748 kN/s, tb=0,  }  
61.Qg2 { ev=2.30, d=22, pd=Kf7, mt=00:00:16, tl=00:14:48, s=15683 kN/s, tb=0,  }  
Rh6 { ev=1.73, d=18, pd=Nxb7, mt=00:00:47, tl=00:14:59, s=720 kN/s, tb=0,  }  
62.Ng5 { ev=2.80, d=19, pd=Bc8, mt=00:00:13, tl=00:15:07, s=15405 kN/s, tb=0,  }  
Bc8 { ev=1.70, d=17, pd=Rh3, mt=00:00:40, tl=00:14:51, s=752 kN/s, tb=0,  }  
63.Rh3 { ev=2.61, d=20, pd=Rh8, mt=00:01:14, tl=00:14:25, s=16879 kN/s, tb=0,  }  
Kd8 { ev=1.97, d=16, pd=Qe4, mt=00:00:48, tl=00:14:36, s=700 kN/s, tb=0,  }  
64.e6 { ev=2.64, d=20, pd=Kc7, mt=00:00:13, tl=00:14:44, s=16574 kN/s, tb=0,  }  
Kc7 { ev=1.93, d=17, pd=Qe4, mt=00:00:19, tl=00:14:49, s=695 kN/s, tb=0,  }  
65.Qe4 { ev=2.76, d=20, pd=Qf6, mt=00:00:13, tl=00:15:02, s=16206 kN/s, tb=0,  }  
Qf6 { ev=1.93, d=17, pd=Nf7, mt=00:00:34, tl=00:14:46, s=645 kN/s, tb=0,  }  
66.Nf7 { ev=2.75, d=20, pd=Rh7, mt=00:00:13, tl=00:15:21, s=17317 kN/s, tb=0,  }  
Rh7 { ev=2.35, d=16, pd=Ne5, mt=00:00:06, tl=00:15:12, s=540 kN/s, tb=0,  }  
67.Ne5 { ev=2.75, d=21, pd=Nfe7, mt=00:00:13, tl=00:15:40, s=17729 kN/s, tb=0,  }  
Nfe7 { ev=2.38, d=17, pd=Ned7, mt=00:00:30, tl=00:15:14, s=616 kN/s, tb=0,  }  
68.Ned7 { ev=2.66, d=21, pd=Qf5, mt=00:00:28, tl=00:15:44, s=18045 kN/s, tb=0,  }  
Qf5 { ev=2.57, d=20, pd=Qe5, mt=00:00:29, tl=00:15:17, s=678 kN/s, tb=0,  }  
69.Qe5+ { ev=2.66, d=19, pd=Qxe5, mt=00:00:00, tl=00:16:16, s=1896 kN/s, tb=0,  }  
Qxe5 { ev=2.57, d=20, pd=dxe5, mt=00:00:08, tl=00:15:40, s=624 kN/s, tb=0,  }  
70.fxe5 { ev=2.88, d=24, pd=Nf5, mt=00:00:21, tl=00:16:27, s=17819 kN/s, tb=0,  }  
Nf5 { ev=2.32, d=19, pd=Nf6, mt=00:00:11, tl=00:16:02, s=656 kN/s, tb=0,  }  
71.Nf8 { ev=3.77, d=23, pd=Rh6, mt=00:00:33, tl=00:16:26, s=16979 kN/s, tb=0,  }  
Rh6 { ev=2.44, d=20, pd=Kh2, mt=00:00:16, tl=00:16:18, s=627 kN/s, tb=0,  }  
72.Kh2 { ev=3.77, d=21, pd=Nde7, mt=00:00:00, tl=00:16:58, s=300 kN/s, tb=0,  }  
Nde7 { ev=2.44, d=20, pd=Rd3, mt=00:00:16, tl=00:16:34, s=586 kN/s, tb=0,  }  
73.Rhf3 { ev=4.31, d=23, pd=Kd8, mt=00:00:20, tl=00:17:10, s=17618 kN/s, tb=0,  }  
Kd8 { ev=3.72, d=20, pd=Ne4, mt=00:00:33, tl=00:16:33, s=596 kN/s, tb=2,  }  
74.Ne4 { ev=3.79, d=20, pd=h4, mt=00:00:00, tl=00:17:42, s=460 kN/s, tb=0,  }  
Kc7 { ev=4.51, d=20, pd=Ng5, mt=00:01:05, tl=00:16:00, s=596 kN/s, tb=72,  }  
75.Rg2 { ev=4.95, d=21, pd=h4, mt=00:00:18, tl=00:17:56, s=17313 kN/s, tb=0,  }  
Nd5 { ev=4.61, d=18, pd=Nf6, mt=00:00:29, tl=00:16:04, s=565 kN/s, tb=0,  }  
76.Rxf5 { ev=5.26, d=19, pd=gxf5, mt=00:00:01, tl=00:18:27, s=10796 kN/s, tb=0,  }  
gxf5 { ev=5.46, d=17, pd=Rg7, mt=00:00:05, tl=00:16:30, s=328 kN/s, tb=0,  }  
77.Rg7+ { ev=5.10, d=17, pd=Kd8, mt=00:00:01, tl=00:18:59, s=5710 kN/s, tb=0,  }  
Kd8 { ev=6.17, d=19, pd=Ng5, mt=00:01:10, tl=00:15:52, s=697 kN/s, tb=389,  }  
78.Ng5 { ev=5.09, d=15, pd=Ne7, mt=00:00:00, tl=00:19:31, s=575 kN/s, tb=0,  }  
Ke8 { ev=6.81, d=20, pd=Ng6, mt=00:00:18, tl=00:16:06, s=655 kN/s, tb=13,  }  
79.Ng6 { ev=5.10, d=13, pd=Rxg6, mt=00:00:00, tl=00:20:03, s=173 kN/s, tb=0,  }  
Bxe6 { ev=6.81, d=22, pd=Nxe6, mt=00:00:18, tl=00:16:20, s=630 kN/s, tb=0,  }  
80.Nxe6 { ev=5.51, d=11, pd=f4, mt=00:00:00, tl=00:20:35, s=209 kN/s, tb=0,  }  
h4 { ev=7.28, d=22, pd=Ngf4, mt=00:00:19, tl=00:16:33, s=649 kN/s, tb=57,  }  
81.Nc5 { ev=5.61, d=9, pd=Kd8, mt=00:00:00, tl=00:21:07, s=74 kN/s, tb=0,  }  
f4 { ev=11.26, d=19, pd=e6, mt=00:06:22, tl=00:10:42, s=819 kN/s, tb=8,  }  
82.e6 { ev=12.59, d=22, pd=Rxg6, mt=00:00:24, tl=00:21:15, s=19610 kN/s, tb=0,  }  
1-0 
; { Game Nr. 24 : Houdini 1.03a 64-bit 6CPU wins against Rybka 4 Exp-61 64-bit 6CPU by GUI adjudication 
; GameDuration = 06:25:04, Finalposition 4k3/6R1/p1p1P1Nr/1pNn4/1P1P1p1p/P7/7K/8 b - - 0 82 }

[Kirk]

Chessmaster waffled between c5 and b4. Not sure b4 is the best move here, but at least the Evals are better than zero

Time Depth Score Positions Moves
1:29 2/13 0.38 30572295 13...c5 14.e5 cxd4 15.exf6 ‡xf6
16.‡f3 †f4 17.‡xd4 †b7 18.†f3 †xf3
19.‡xf3 ˆfc8 20.†xf4 ‰xf4


1:59 2/13 0.31 40378788 13...b4 14.e5 bxc3 15.g3 †xg3 16.exf6
‡xf6 17.fxg3 ‰xg3 18.bxc3 ‰h4+
19.‹g2 c5 20.ˆb1 ‡d5 21.dxc5

[Houdini]

Bram,

This was indeed a very fine game from Houdini. It's amazing that White can actually give away the h2 pawn at move 12 and compensate for it completely with positional elements for the entire middlegame.

One evaluation element that may have made a difference is that Houdini discounts heavily (by 40 centipawn) the bishop trapped on a8 behind its own pawns. Rybka probably doesn't recognize this bishop trapping pattern.

As for the "despite being regarded so closely related…", as will be obvious to anyone watching Rybka play vs Houdini, their styles of play are very different, their evaluations are different, their main lines are very different, and their overall strenghts and weaknesses are very different. Only their playing strength is quite close.

Robert

[beram]

Bram,

This was indeed a very fine game from Houdini. It's amazing that White can actually give away the h2 pawn at move 12 and compensate for it completely with positional elements for the entire middlegame.

One evaluation element that may have made a difference is that Houdini discounts heavily (by 40 centipawn) the bishop trapped on a8 behind its own pawns. Rybka probably doesn't recognize this bishop trapping pattern.

As for the "despite being regarded so closely related…", as will be obvious to anyone watching Rybka play vs Houdini, their styles of play are very different, their evaluations are different, their main lines are very different, and their overall strenghts and weaknesses are very different. Only their playing strength is quite close.

Robert

Hi Robert,
I do agree on that. I watched a lot of games (and a lot of analysis) of Rybka versus Houdini and I came to the same conclusion. I disagree with those people who without evidence claim otherwise.

kind regards Bram

[Graham Banks]

Bram,

This was indeed a very fine game from Houdini. It's amazing that White can actually give away the h2 pawn at move 12 and compensate for it completely with positional elements for the entire middlegame.

One evaluation element that may have made a difference is that Houdini discounts heavily (by 40 centipawn) the bishop trapped on a8 behind its own pawns. Rybka probably doesn't recognize this bishop trapping pattern.

As for the "despite being regarded so closely related…", as will be obvious to anyone watching Rybka play vs Houdini, their styles of play are very different, their evaluations are different, their main lines are very different, and their overall strenghts and weaknesses are very different. Only their playing strength is quite close.

Robert

One can tweak the settings of Chessmaster so that it plays quite differently to the default settings. However, nobody doing so claims the changed settings as their own engine.

[Damir]

Last time I looked, I did not notice Houdini with any settings, so there is hardly something to tweak, unless you saw something which is not there...

[michiguel]

Bram,

This was indeed a very fine game from Houdini. It's amazing that White can actually give away the h2 pawn at move 12 and compensate for it completely with positional elements for the entire middlegame.

One evaluation element that may have made a difference is that Houdini discounts heavily (by 40 centipawn) the bishop trapped on a8 behind its own pawns. Rybka probably doesn't recognize this bishop trapping pattern.

As for the "despite being regarded so closely related…", as will be obvious to anyone watching Rybka play vs Houdini, their styles of play are very different, their evaluations are different, their main lines are very different, and their overall strenghts and weaknesses are very different. Only their playing strength is quite close.

Robert

Hi Robert,
I do agree on that. I watched a lot of games (and a lot of analysis) of Rybka versus Houdini and I came to the same conclusion. I disagree with those people who without evidence claim otherwise.

kind regards Bram

What people? I have never seen anybody claiming Houdini had a direct connection to Rybka. People claimed other things, but not what you are saying.

Miguel

[Albert Silver]

Last time I looked, I did not notice Houdini with any settings, so there is hardly something to tweak, unless you saw something which is not there...

He meant Rybka which is playing with unusual settings that affect its play.

[notyetagm]

Houdini is so damn strong.

Can't wait for the next version to come out.

[Martin Thoresen]

Houdini is so damn strong.

Can't wait for the next version to come out.

These are a few quotes from Robert Houdart, from the chat in chessbomb during TCEC Tournament 5:

RHoudini: @Lonkosi: Houdini 1.5 will be released before the end of the year

RHoudini: Hi there, the next Houdini release will be Windows-only, no plans for a Mac version

RHoudini: @kazi92: yes, next Houdini will have tablebase support; more details later