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Subject: Re: Silver.epd {Rybka 15 minute analysis per position}

Author: Uri Blass

Date: 00:19:08 01/19/06

Go up one level in this thread


On January 18, 2006 at 15:31:34, Dann Corbit wrote:

>On January 18, 2006 at 15:20:43, Albert Silver wrote:
>
>>On January 18, 2006 at 13:46:37, Dann Corbit wrote:
>>
>>>On January 18, 2006 at 13:39:22, Albert Silver wrote:
>>>[snip]
>>>[D]rn1qkbnr/pp3ppp/2p1p3/3pPb2/3P4/5N2/PPP1BPPP/RNBQK2R b KQkq - fmvn 5; id
>>>"Silver Suite - Caro-Kann, Advance : ECO B12";
>>>
>>>>>     17	14:24	  82.327.198	97.659	-0.23	Bf8b4+ Bc1d2 Bb4xd2+ Qd1xd2 Nb8d7 Nb1c3
>>>>>Ng8e7 000 00 Kc1b1
>>>>>   1/18/2006 5:17:33 AM, Time for this analysis: 00:15:00, Rated time: 7:15:00
>>>>
>>>>Let no one claim the suite was made to favor Rybka. :-)
>>>>
>>>>I knew it played this dreadful move, since when testing the positions, I used
>>>>Rybka, Fruit, and Tiger to see how they treated them. The position is quite
>>>>flexible and according to the tree in Chess Assistant, there are several
>>>>acceptable continuations.
>>>
>>>If you have a list of pm, bm or am (like the above Bb4+ should be am) I would be
>>>very pleased to get them.
>>>
>>>>I am playing a match between Rybka and Fritz 9 (arrived yesterday) at 10m + 2s.
>>>>and the games are quite good. The way Fritz took Rybka apart in the first game
>>>>playing the aginst the Bird, makes me wonder whether the position is well
>>>>chosen, or whether Rybka just didn't see the danger. Still, after 40 games,
>>>>Rybka Beta 10 leads 26.5 - 13.5 with only 11 draws in 40 games! Talk about
>>>>blood-thirsty. Below is the game I mentioned.
>>>
>>>[snip of game]
>>
>>In theory there shouldn't be any single Best Move, since the purpose was to
>>avoid this as a starting position.
>>
>>Avoid Move such as Rybka's Bb4+ is only possible by knowing the engine would
>>play such a thing, and even so, it may be alone in this nutty idea. I'd hardly
>>make a list of every silly move in a postions and label them 'avoid move'. :-)
>
>If a strong chess engine after 15 minutes of analysis makes the mistake, then I
>think it is an ideal avoid move position.

15 minutes are simply not enough time
Rybka needs more than an hour.

New game
[D]rn1qkbnr/pp3ppp/2p1p3/3pPb2/3P4/5N2/PPP1BPPP/RNBQK2R b KQkq - 0 1

Analysis by Rybka 1.01 Beta 10d 32-bit:

1...Na6
  =  (0.14)   Depth: 3   00:00:00
1...Na6
  =  (0.17)   Depth: 4   00:00:00
1...Na6 2.0-0
  ²  (0.28)   Depth: 5   00:00:00
1...Nd7 2.0-0
  =  (0.24)   Depth: 5   00:00:00
1...Nd7 2.0-0 Qb6
  =  (0.24)   Depth: 6   00:00:00  12kN
1...Nd7 2.0-0 Nh6 3.Nc3
  ²  (0.33)   Depth: 7   00:00:00  34kN
1...Bb4+ 2.Bd2 Bxd2+ 3.Qxd2 Ne7 4.Nc3 Nd7
  ²  (0.28)   Depth: 7   00:00:01  84kN
1...Bb4+ 2.Nc3 Nd7 3.0-0 Ne7 4.Bd2
  ²  (0.27)   Depth: 8   00:00:01  124kN
1...Bb4+ 2.Nc3 Nd7 3.0-0 Ne7 4.Bd2 c5
  ²  (0.27)   Depth: 9   00:00:02  182kN
1...Bb4+ 2.Nc3 Nd7 3.0-0 Ne7 4.a3 Bxc3 5.bxc3 0-0
  =  (0.25)   Depth: 10   00:00:03  330kN
1...Bb4+ 2.Nc3 Nd7 3.0-0 Ne7 4.Nh4 0-0 5.Bg5 Qb6
  ²  (0.29)   Depth: 11   00:00:06  564kN
1...Bb4+ 2.Nc3 Nd7 3.0-0 Ne7 4.Nh4 0-0 5.Bg5 Qb6 6.Qd2
  ²  (0.29)   Depth: 12   00:00:12  1117kN
1...Bb4+ 2.Nbd2 Nd7 3.0-0 Ne7 4.Nh4 0-0 5.c3 Ba5 6.Nxf5 Nxf5 7.Nf3
  ²  (0.28)   Depth: 13   00:00:36  3337kN
1...Bb4+ 2.Nbd2 Nd7 3.0-0 a5 4.Nb1 a4 5.a3 Ba5 6.Nc3 Ne7 7.Nxa4
  ²  (0.30)   Depth: 14   00:01:16  7426kN
1...Bb4+ 2.Nbd2 Nd7 3.0-0 a5 4.Nb1 a4 5.a3 Ba5 6.Bg5 f6 7.exf6 gxf6
  ²  (0.27)   Depth: 15   00:02:12  13065kN
1...Bb4+ 2.Nbd2 Nd7 3.0-0 Be7 4.Nb3 h5 5.Ne1 h4 6.Bd3 Bxd3 7.Nxd3 Nh6 8.Qh5
  ²  (0.27)   Depth: 16   00:04:04  24121kN
1...Bb4+ 2.Nc3 Nd7 3.0-0 Ne7 4.Nh4 0-0 5.g4 Bg6 6.Bg5 h6 7.Nxg6 fxg6 8.Bd2
  =  (0.25)   Depth: 17   00:08:59  50759kN
1...Bb4+ 2.Nbd2 Nd7 3.0-0 Be7 4.Nb3 h5 5.Bf4 g5 6.Be3 g4 7.Ne1 Qb6 8.Nd3
  =  (0.22)   Depth: 18   00:25:22  133776kN
1...Bb4+ 2.Nc3 Nd7 3.0-0 h6 4.a3 Ba5 5.b4 Bb6 6.Be3 Ne7 7.Nh4 0-0 8.Bd3
  =  (0.25)   Depth: 19   00:40:41  212877kN
1...Nd7 2.0-0 Be7 3.Nc3 h5 4.h3 Nh6 5.Nh2 c5 6.Nf3 Bg6 7.dxc5 Nxc5 8.Bb5+
  =  (0.22)   Depth: 19   01:02:49  310298kN

(,  19.01.2006)

Uri



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