Author: Dann Corbit
Date: 13:56:27 07/10/00
Go up one level in this thread
On July 10, 2000 at 16:32:40, Dann Corbit wrote:
>On July 09, 2000 at 16:14:12, Tom King wrote:
>>On July 09, 2000 at 08:19:46, Ed Schröder wrote:
>>
>>>On July 09, 2000 at 06:52:15, Michael de la Maza wrote:
>>>
>>>>The following position appeared in a game in the U1800 section of the World
>>>>Open.
>>>>
>>>>[D]rnbr2k1/ppq1ppbp/6p1/1Pp1P3/2P5/P2B1N1P/2QB1PP1/4RRK1 w - - 3 22
>>>>
>>>>White played 22. e6!!
>>>>
>>>>On a P90 it takes Fritz 6 4:17:38 (that's four hours, seventeen minutes, and 38
>>>>seconds) to find this move. Initially, it gets a score of +0.38. At 5:06:33
>>>>the score increases to 0.56. Finally, at 6:03:33 the score goes to +0.59.
>>>
>>>Rebel Century 2.0 (5:46)
>>>
>>>Nice position, saved this one.
>>>
>>>Ed
>>>
>>>00:00 06.00 0.12 1.Be4 a5 2.Qb1 Nd7 3.e6 fxe6
>>>00:01 07.00 0.13 1.Be4 a6 2.Qa4 a5 3.Qc2 Nd7 4.e6
>>>00:04 08.00 0.10 1.Be4 a6 2.Qa4 a5 3.Qb3 a4 4.Qc3 Be6 5.Ng5+
>>>00:06 08.01 0.11 1.Qb3 Bd7 2.Re2 a6 3.b6 Qc8 4.Ng5 Nc6
>>>00:08 08.03 0.15 1.Bc3 a6 2.Bb2 axb5 3.cxb5 Bd7 4.Ng5 h6 5.Ne4
>>>00:16 09.00 0.14 1.Bc3 a6 2.a4 axb5 3.axb5 b6 4.Ng5 Bb7 5.f4 e6
>>>00:21 09.02 0.18 1.Be4 a6 2.Qa4 a5 3.Bf4 Nd7 4.Rd1 Ra7 5.Bd5
>>>00:42 10.00 0.16 1.Be4 a6 2.a4 Nd7 3.e6 fxe6 4.a5 Nf6 5.b6 Qd6
>>>01:07 10.01 0.16 1.Bc3
>>>01:11 10.01 0.22 1.Bc3 e6 2.Be4 Nd7 3.Rd1 a6 4.Qa4 Rf8 5.Rfe1 Nxe5
>>>02:21 11.00 0.36 1.Bc3 Qb6 2.Rd1 Nd7 3.Be4 a6 4.e6 Qxe6 5.Ba5 Re8 6.Rfe1
>>>05:46 11.31 0.36 1.e6
>>>05:47 11.31 0.42 1.e6 Bxe6 2.Rxe6 fxe6 3.Bxg6 hxg6 4.Qxg6 Rxd2 5.Ng5 Na6
>>>6.Qf7+
>>>12:11 12.00 0.56 1.e6 f5 2.Bc3 a6 3.Bxg7 Kxg7 4.Qb2+ Kg8 5.Bc2 Rd6 6.bxa6
>>>
>>>Athlon 600, 128 Mb
>>>
>>>
>>[snip]
>>
>>looks like it's one that Rebel is getting on positional grounds. My program
>>doesn't get it after several hours (she prefers the boring move a4). So can
>>anyone explain the main line behind the more? Or is Rebel's PV sufficient?
>
>Phalanx also chooses e6, and one ply earlier than Rebel. However, then it goes
>back to Be4:
>rnbr2k1/ppq1ppbp/6p1/1Pp1P3/2P5/P2B1N1P/2QB1PP1/4RRK1 w - -
> -> soft time limit 357.14 s
> -> hard time limit 6666.66 s
> 8 -> 0:00.96 49649 0 turns
> 9 72 96 49650 Qc2-b3
> 9 -> 0:12.62 693647 0 turns
> 10 57 6479 3531247 Qc2-b3 Bc8-e6 Bd2-f4 Nb8-d7 Re1-e2 Nd7-b6
> 10 62 11534 6201567 Bd2-c3 !
> 10 62 12560 6679095 Bd2-c3 Pa7-a6
> 10 64 21620 11315879 Pa3-a4 Pa7-a6 Pa4-a5 Pa6xb5 Pc4xb5 Bc8-e6
> Bd2-c3 Be6-d5 Nf3-g5 Ph7-h6 Pb5-b6
> 10 69 42317 21935115 Pe5-e6 !
> 10 72 45106 23566282 Pe5-e6 Bc8xe6 Re1xe6 Pf7xe6 Bd3xg6 Ph7xg6
> Qc2xg6 Rd8-f8 Bd2-h6 Rf8-f7 Bh6xg7 Rf7xg7
> Qg6-e8 Kg8-h7 Qe8-h5 Kh7-g8
> 10 74 54206 28112022 Bd3-e4 Pa7-a6 Qc2-a4 Nb8-d7 Pe5-e6 Pf7xe6
> Bd2-a5 Nd7-b6 Qa4-b3 Pa6xb5 Qb3xb5
>
>It might be interesting to pound the stuffings out of this one and see what
>chess engines think at deep time controls and why.
Here is ply 11 for Phalanx, back to e6. Also interesting is the size of the ce:
rnbr2k1/ppq1ppbp/6p1/1Pp1P3/2P5/P2B1N1P/2QB1PP1/4RRK1 w - -
-> soft time limit 642.85 s
-> hard time limit 11999.9 s
9 -> 0:00.68 50846 0 turns
10 74 68 50847 Bd3-e4
10 -> 0:01.83 139486 0 turns
11 76 34784 15868927 Bd3-e4 Pa7-a6 Qc2-a4 Rd8-f8 Be4-d5 Bc8-f5
Pe5-e6 Pf7xe6 Bd5xe6 Bf5xe6 Re1xe6 Qc7-d7
Re6-e2 Bg7-d4
11 81 112619 54648682 Pe5-e6 !
11 89 123349 60377380 Pe5-e6 Bc8xe6 Re1xe6 Rd8xd3 Qc2xd3 Pf7xe6
Qd3-e4 Qc7-c8 Nf3-g5
11 -> 21:46.82 64039192 1 turn
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