Author: Landon Rabern
Date: 19:02:44 04/18/01
Go up one level in this thread
On April 18, 2001 at 21:27:18, Dieter Buerssner wrote:
>On April 18, 2001 at 19:05:18, Landon Rabern wrote:
>
>>Would someone solve these and post the results here? It is hard to test without
>>knowing what the results should be.
>
>Yace, all 4-men and very few 5-men TBs
>
>>K7/8/8/7p/N2k4/8/8/8 w - -
> nodes time score depth
> 196 3.141 0.00 62. 1.Nb2 {EGTB} 1...h4 2.Nd1 h3 3.Nf2 h2 4.Ka7
> h1=Q 5.Nxh1! {No mating material} {340}
>
>
>
>>8/8/8/2k5/p1b5/8/1P1K4/8 w - -
>
>I don't know the solution. Here Yace shows very strange jumping of scores. I
>just give you the PV I get after some time:
>
> 43441723 6:41.2 -5.47 22t 1.Kc2 Kd4 2.Kb1 Bb3 3.Ka1 Ke3 4.Kb1 Bd5 5.Kc2
> Kd4 6.Kb1 Bc4 7.Ka1H Kc5H 8.Kb1H Kb4H 9.Ka1H
> Kb3H 10.Kb1H Be2H 11.Ka1H Bf3H 12.Kb1H Bc6H
> 13.Ka1H Kc2H 14.Ka2H Bd5+H 15.Ka1H Kd2H 16.Kb1H
> Bc4H 17.Ka1H Bd5H 18.Kb1H Bc4H 19.Ka1H Bd5HR
> {-350}
>
>The "H" at the end of a move means, that this move was picked from the hash
>tables at display time (and not at search time). So, these moves may not be
>reliable. The "HR" means, that this is a repetition of position in the hash
>tables. So, this will not fit the score at all. Others, with better programs,
>mor patience or more TBs will be able to give a better result.
>
>
>>6k1/3p4/8/8/8/B7/P7/7K w - -
>
> 33045691 4:06.4 17.59 20t 1.Bb4 Kf7 2.a4 Ke6 3.a5 Kd5 4.a6 Kc6 5.Ba5 d5
> 6.Kg2 d4 7.Kf3 d3 8.Ke3 Kb5 9.a7 Kc6 10.a8=Q+
> Kd6 11.Qa6+ Kd5H {HT} {1271}
>
>>8/8/2B5/7b/7k/2K5/1P6/8 w - -
>
> 45414533 7:12.8 Mat22 22t 1.Bb4 Kf7 2.a4 Ke6 3.a5 Kd5 4.a6 Kc6 5.Ba5 d6
> 6.Kg2 d5 7.Kf3 Kb5H 8.a7H Kc4H 9.a8=QH Kc5H
> 10.Qe8H Kd6H {HT} {1271}
These positions have nearly the same PV, are you sure the second is correct?
Because I get a different first move, b4.
Thanks for the analysis,
Landon W. Rabern
>
>>8/4K3/8/3k4/8/1N1B4/6p1/8 w - -
>
> 35125 1.768 0.00 8t 1.Bc4+ Kc6 2.Nd4+ Kc5 3.Nf3 Kxc4 {EGTB} 4.Nd2+
> Kd4 5.Nf3+! Ke4 6.Ng1 Kf4 7.Ne2+ Kg4 8.Ng1 Kh4
> 9.Ne2 g1=Q 10.Nxg1! {No mating material} {340}
>
>>7K/6p1/8/7p/8/8/R7/6k1 w - -
>
> 866 3.926 Mat29 62t 1.Kh7 {EGTB} 1...h4! 2.Kg6! h3! 3.Kg5 h2! 4.Kg4
> {Not all positions found in TB} {340}
>
>
>>8/R7/3P4/6r1/8/8/8/1k5K w - -
>
> 741 3.060 Mat33 62t 1.d7 {EGTB} 1...Rd5! {Not all positions found
> in TB} {80}
>
>The {Not all ...} means, that Yace is not able to display the whole mating line,
>because some TBs are missing.
>
>To your former question, about endgame test position. Have a look at
>www.jakob.at. There you will find a very interesting endgame testsuite. Some of
>the positions can be solved by TBs. In other positions, TBs will help.
>
>Regards,
>Dieter
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