Author: Richard Pijl
Date: 12:04:22 02/16/04
Go up one level in this thread
On February 16, 2004 at 02:08:40, Richard Pijl wrote:
>On February 15, 2004 at 17:36:20, Jaime Benito de Valle Ruiz wrote:
>
>>On February 15, 2004 at 16:31:35, Richard Pijl wrote:
>>
>>>In the final round of IPCCC The Baron played with black against Comet. The Baron
>>>did scare me by playing Nxd4 in the position below. However, it turned out to be
>>>correct and the Baron won the resulting endgame.
>>>
>>>[D] 3r2k1/pb3qbp/1pnrp3/1B3p2/Q2P4/4B3/P3NPPP/1R1R2K1 b - - 3 23
>>>
>>>Full game:
>>>
>>>[Event "IPCCC"]
>>>[Site "Paderborn"]
>>>[Date "2004.02.15"]
>>>[Round "7"]
>>>[White "Comet"]
>>>[Black "The Baron"]
>>>[Result "0-1"]
>>>[ECO "D86"]
>>>[Opening "Gruenfeld"]
>>>[Variation "Exchange, Simagin's improved Variation"]
>>>
>>>1.c4 Nf6 2.d4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 Nc6
>>>9.O-O b6 10.Bd3 Bb7 11.Bg5 Qd7 12.Qd2 Rfd8 13.Rfd1 f6 14.Bf4 e6 15.Rab1 Qf7
>>>16.Be3 Rd6 17.Qc2 Rad8 18.c4 R6d7 19.c5
>>>f5 20.exf5 gxf5 21.cxb6 cxb6 22.Bb5 R7d6 23.Qa4 Nxd4 24.Rxd4 Bxd4 25.Bxd4 Qg6
>>>26.f3 Bxf3
>>>27.Nf4 R6xd4 28.Qxd4 Rxd4 29.Nxg6 Be4 30.Ne7+ Kf8
>>>31.Nxf5 Bxf5 32.Rc1 Rb4 33.Bf1 a5 34.Rc3 Rb2 35.a3 Ke7 36.Bd3 Bxd3 37.Rxd3 Kf6
>>>38.Rf3+ Ke5 39.Rh3 Ra2 40.Rxh7 Rxa3 41.Rh5+ Kd6 42.Rb5 Kc6 43.Re5 Ra1+ 44.Kf2
>>>Kd6 45.Rb5 Kc6 46.Re5 a4 47.Rxe6+ Kc5
>>>48.Re5+ Kb4 49.Re4+ Ka5 50.h3 a3 51.Re7 a2 0-1
>>
>>Interesting position.
>>Some programs can find it within a minute or two in my computer (1800XP+), but
>>Shredder 7 doens't see it after 5 minutes in "infinite analysis".
>>Ruffian 1.05, Hiarcs 9, and Shredder 8. need about a minute, more or less.
>>Fritz 8 finds it in 13 seconds, then it drops it, and comes back to it after a
>>minute, like the others.
>>Some other amateur engines that I've tried seem to find it harder.
>>How long did it take to yours? (was it pondering?)
>
>I just checked the logfile. The Baron was playing on an AMD MP 2000+ (dual) and
>needed about 4 minutes (including pondering) to select Nxd4. I have not yet
>checked it from a clean hash situation, but will do that this evening (with the
>single CPU version).
>
Looking a little closer, it seems I made an error when compiling the Baron for
the last rounds. I was playing with a single CPU version. Below the analysis for
the just released 1.2.0 version on a single CPU. The SMP version finds it a
little quicker: 2 min 17 sec.
Baron 1.2.0, single CPU version:
ply time nodes score pv
4(10). 0:00.13 25692 +0.10 Nc6-a5 Qa4-b4 Qf7-h5 Be3-f4
5( 8)& 0:00.17 35710 +0.18 Nc6-a5 Qa4-b4 Qf7-h5 Ne2-g3 Qh5-h4
5(12). 0:00.34 73978 +0.18 Nc6-a5 Qa4-b4 Qf7-h5 Ne2-g3 Qh5-h4
6(13)& 0:00.50 113384 -0.05 Nc6-a5 Be3-f4 Qf7-g6 g2-g3 Rd6-d5 Qa4-c2
6(13)& 0:00.72 163037 +0.09 Qf7-g6 Ne2-f4 Qg6-g4 h2-h3 Qg4-h4 Bb5xc6
6(15). 0:01.33 303638 +0.09 Qf7-g6 Ne2-f4 Qg6-g4 h2-h3 Qg4-h4 Bb5xc6
7(17)& 0:02.31 521435 +0.09 Qf7-g6 Ne2-f4 Qg6-g4 h2-h3 Qg4-h4 Bb5xc6
Bb7xc6 Qa4xa7
7(18). 0:04.45 1033855 +0.09 Qf7-g6 Ne2-f4 Qg6-g4 h2-h3 Qg4-h4 Bb5xc6
Bb7xc6 Qa4xa7
8(18)& 0:06.84 1599873 +0.00 Qf7-g6 Ne2-f4 Qg6-f7 Nf4-e2 <rep>
8(19)& 0:14.28 3488728 +0.08 Nc6-a5 Be3-f4 Qf7-g6 g2-g3 Rd6-d5 Qa4-c2
Rd8-c8 Qc2-b2
8(19). 0:14.53 3551566 +0.08 Nc6-a5 Be3-f4 Qf7-g6 g2-g3 Rd6-d5 Qa4-c2
Rd8-c8 Qc2-b2
9(21)& 0:17.45 4300081 -0.18 Nc6-a5 Be3-f4 Rd6-d5 Bf4-g5 Rd8-c8 Rb1-c1
Qf7-g6 Rc1xc8 Bb7xc8 Qa4-c2 (Qg6xg5)
9(22)& 0:32.42 7867638 +0.11 Qf7-g6 Ne2-f4 Qg6-g4 f2-f3 Qg4-h4 Bb5xc6
Bb7xc6 Qa4xa7 e6-e5 (g2-g3)
9(24). 0:55.61 13799391 +0.11 Qf7-g6 Ne2-f4 Qg6-g4 f2-f3 Qg4-h4 Bb5xc6
Bb7xc6 Qa4xa7 e6-e5 (g2-g3)
10(24)& 1:19.14 19610780 +0.04 Qf7-g6 Ne2-f4 Qg6-g4 Bb5-e2 Qg4-h4 Be2-f3
Rd8-d7 g2-g3 Qh4-h6 Qa4-c4
10(27)& 3:09.81 48816267 +0.30 Nc6xd4 Rd1xd4 Bg7xd4 Be3xd4 Qf7-g6 f2-f3
Bb7xf3 Ne2-f4 Qg6-g5 Bd4-c3 a7-a5 Rb1-f1
Rd6-d1 Bc3-e5
10(27). 3:34.73 55151953 +0.30 Nc6xd4 Rd1xd4 Bg7xd4 Be3xd4 Qf7-g6 f2-f3
Bb7xf3 Ne2-f4 Qg6-g5 Bd4-c3 a7-a5 Rb1-f1
Rd6-d1 Bc3-e5
11(29)+ 6:20.75 99142420 +0.65 Nc6xd4 (Rd1xd4) (Bg7xd4) (Be3xd4) (a7-a6)
(Bb5xa6)
(Bb7xa6) (Qa4xa6) (e6-e5) (Qa6-d3) (e5xd4)
(Rb1xb6)
(Rd6xb6) (Qd3-a3)
11(31)& 9:39.22 151104314 +0.87 Nc6xd4 Be3xd4 Qf7-g6 g2-g3 Qg6-g4 Bd4xg7
Qg4-f3 Kg1-f1 Rd6xd1 Rb1xd1 Qf3-g2 Kf1-e1
Qg2-h1 Ne2-g1 Qh1xg1 Bb5-f1 Rd8xd1 Qa4xd1
Kg8xg7
11(31). 10:22.50 162063857 +0.87 Nc6xd4 Be3xd4 Qf7-g6 g2-g3 Qg6-g4 Bd4xg7
Qg4-f3 Kg1-f1 Rd6xd1 Rb1xd1 Qf3-g2 Kf1-e1
Qg2-h1 Ne2-g1 Qh1xg1 Bb5-f1 Rd8xd1 Qa4xd1
Kg8xg7
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