Author: Jeremiah Penery
Date: 19:19:09 04/19/99
Go up one level in this thread
On April 19, 1999 at 21:32:31, Bruce Moreland wrote:
>
>On April 19, 1999 at 21:30:23, Bruce Moreland wrote:
>
>>
>>On April 19, 1999 at 20:24:44, Jeremiah Penery wrote:
>>
>>>Which ones do you think may not be completely sound?
>>
>>The orignal r.g.c. posts I have about this test set contained some information.
>>
>>Deep Thought II solved them as follows:
>>
>> DT
>>1 6/8hr
>>2 2/3min
>>3 ---------
>>4 2.5/3.8hr
>>5 2/4hr
>>6 ---------
>>7 6/12hr
>>8 ---------
>>9 ---------
>>10 2min
>>11 5min
>>
>>It's a little weird to read this list. The first entry, "6/8hr", means that DT
>>would play it after 6 hours, but resolved the fail high after 8 hours.
>>
>>It didn't find four of them.
>>
>>Hsu claims that 3 and 6 are sound "positional" sacrifices.
>>
>>He thinks that 8 may be flawed because the opponent in the real game defended
>>poorly.
>
>I accidently pressed "submit follow up", apparently. Anyway, to continue, I
>can't figure out what he thinks about 9, but DT II didn't find the answer to
>this one, it preferred to play 1. Nf6, eventually with a slightly positive
>score.
>
>I think that it is fair to say that the ones that it finds are probably sound,
>while the ones that it doesn't find might not be sound, or are at least
>extremely difficult.
>
>bruce
I have some interesting results - especially with number 3 - with a version of
Crafty I have made recently. When I have long analyses for all positions, I
will post results, but here are some early results from #3.
4 0.11 ++ 1. h3!!
4 0.18 -0.99 1. Kd2 Kd7 2. Kc2 Nxf3 3. gxf3
4-> 0.26 -0.99 1. Kd2 Kd7 2. Kc2 Nxf3 3. gxf3
<Kd2 is best move throughout this interval>
9 29.59 -0.74 1. Kd2 Rf8 2. Rf1 Kd7 3. Kc2 Kc8 4.
b3 Qd7 5. Be2
9 39.84 ++ 1. Nxg5!!
9 41.11 0.00 1. Nxg5 Bxd1 2. Nxe6 Qc8 3. Bf5 Bc2
4. Nxg7+ Kd8 5. Ne6+ Ke8 6. Ng7+
9-> 42.02 0.00 1. Nxg5 Bxd1 2. Nxe6 Qc8 3. Bf5 Bc2
4. Nxg7+ Kd8 5. Ne6+ Ke8 6. Ng7+
<Nxg5 is best throughout this interval>
14 10:24 0.01 1. Nxg5 Bxd1 2. Nxe6 Qb8 3. Kxd1 g6
4. Nf4 Kd8 5. Nxd5 Bh4 6. Ne4 Qc8 7.
Kc2 Qe6
Previous 'versions' gave a score around +0.75, and the best move switched
between Nxg5 and h3.
Jeremiah
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