Author: Dieter Buerssner
Date: 13:52:39 02/17/05
Go up one level in this thread
On February 16, 2005 at 20:54:21, Scott Gasch wrote:
>I'd be surprised to see many engines solve wac002 in under 5 seconds _with a PV
>that includes a promotion_.
Yace should show a promotion under 5 s even on Dann's old PC. Here it needs 1.3
s with 50 MB hash:
978963 1.000 0.97 9. 1...Rxb2 2.Rxb2 c3 3.Rb6+ Ke7 4.Rb7+ Kd6 5.Rb6+
Kc5 6.Rb1 c2 7.Rc1 Kc6
1298228 1.297 1.37 10++ 1...Rxb2 2.Rxb2 c3 3.Rb6+ Ke7 4.Rb7+ Kd6 5.Rb6+
Kc5 6.Rb1 c2 7.Rb7 d2 8.Rb8 c1=Q 9.e4 {501}
1610897 1.640 2.37 10++ 1...Rxb2 2.Rxb2 c3 3.Rb6+ Ke7 4.Rb7+ Kd6 5.Rb6+
Kc5 6.Rb1 c2 7.Rb7 d2 8.Rb8 c1=Q 9.e4 {501}
2104718 2.187 2.93 10t 1...Rxb2 2.Rxb2 c3 3.Rb6+ Ke7 4.Rb7+ Kd6 5.Rb6+
Kc5 6.Rb7 c2 7.Rxh7 d2 8.Rc7+ Kd6 9.Rxc2 d1=Q+
10.Re2 Kd5 {341}
2214552 2.297 2.93 10. 1...Rxb2 2.Rxb2 c3 3.Rb6+ Ke7 4.Rb7+ Kd6 5.Rb6+
Kc5 6.Rb7 c2 7.Rxh7 d2 8.Rc7+ Kd6 9.Rxc2 d1=Q+
10.Re2 Kd5 {341}
3174865 3.297 3.33 11++ 1...Rxb2 2.Rxb2 c3 3.Rb6+ Ke7 4.Rb7+ Kd6 5.Rb6+
Kc5 6.Rb7 c2 7.Rxh7 d2 8.Rc7+ Kb6 9.Kf2 d1=Q
10.Rd7 {421}
5357756 5.640 3.70 11t 1...Rxb2 2.Rxb2 c3 3.Rb6+ Ke7 4.Rb7+ Kd6 5.Rb6+
Kc5 6.Rb1 c2 7.Rc1 Kb5 8.Kg3 d2 9.Rxc2 d1=QH
{421}
5467870 5.765 3.70 11. 1...Rxb2 2.Rxb2 c3 3.Rb6+ Ke7 4.Rb7+ Kd6 5.Rb6+
Kc5 6.Rb1 c2 7.Rc1 Kb5 8.Kg3 d2 9.Rxc2 d1=Q
{421}
9055500 9.593 3.87 12t 1...Rxb2 2.Rxb2 c3 3.Rb6+ Ke7 4.Rb7+ Kd6 5.Rb6+
Kc7 6.Rb1 c2 7.Rc1 Kd7H 8.Kg3H d2H 9.Rxc2H
d1=QH 10.Rc5H Qg1+H 11.Kf3H Ke6H {421}
9375332 9.937 3.87 12. 1...Rxb2 2.Rxb2 c3 3.Rb6+ Ke7 4.Rb7+ Kd6 5.Rb6+
Kc7 6.Rb1 c2 7.Rc1 Kd7 8.Kg3 d2 9.Rxc2 d1=Q
10.Rc5 Qg1+ 11.Kf3 Ke6 {421}
17280820 18.422 4.00 13t 1...Rxb2 2.Rxb2 c3 3.Rb6+ Ke7 4.Kf2 c2 5.Rc6 d2
6.Rxc2 d1=Q 7.Rc7+ Ke6 8.Rxh7 Qd2+ 9.Kf3 Qd5+
10.Kf2 Qa2+ 11.Kf3 Qxa3 12.Ra7 {421}
18975367 20.218 4.00 13. 1...Rxb2 2.Rxb2 c3 3.Rb6+ Ke7 4.Kf2 c2 5.Rc6 d2
6.Rxc2 d1=Q 7.Rc7+ Ke6 8.Rxh7 Qd2+ 9.Kf3 Qd5+
10.Kf2 Qa2+ 11.Kf3 Qxa3 12.Ra7 {421}
32832950 35.703 4.03 14t 1...Rxb2 2.Rxb2 c3 3.Rb6+ Ke7 4.Kf2 c2 5.Rc6 d2
6.Rxc2 d1=Q 7.Rc7+ Ke6 8.Rxh7 Qd2+ 9.Kf3 Qd5+
10.Ke2 Qa2+ 11.Kd1 {341}
35530301 38.734 4.03 14. 1...Rxb2 2.Rxb2 c3 3.Rb6+ Ke7 4.Kf2 c2 5.Rc6 d2
6.Rxc2 d1=Q 7.Rc7+ Ke6 8.Rxh7 Qd2+ 9.Kf3 Qd5+
10.Ke2 Qa2+ 11.Kd1 {341}
64974205 1:10.7 4.43 15++ 1...Rxb2 2.Rxb2 c3 3.Rb6+ Ke7 4.Kf2 c2 5.Rc6
Kd7 6.Rc5 d2 7.Rxc2 d1=Q 8.Rc5 Qd2+ 9.Kf1 Qxe3
10.Ra5 Qxa3 11.h4 {581}
97656603 1:47.0 4.58 15t 1...Rxb2 2.Rxb2 c3 3.Rb6+ Ke7 4.Kf2 c2 5.Rc6
Kd7 6.Rc5 d2 7.Rxc2 d1=Q 8.Rc5 Qd2+ 9.Kf3 Qxh2
10.Rxf5 Qh3+ 11.Ke4 Qh1+ {HT} {421}
103839043 1:53.4 4.58 15. 1...Rxb2 2.Rxb2 c3 3.Rb6+ Ke7 4.Kf2 c2 5.Rc6
Kd7 6.Rc5 d2 7.Rxc2 d1=Q 8.Rc5 Qd2+ 9.Kf3 Qxh2
10.Rxf5 Qh3+ 11.Ke4 Qh1+ {HT} {421}
>It seems like this is a position that overvaluing
>passers can help you solve quickly.
Yes. I think in Yace, I am using rather small values, unless really convinced,
that the pawns are very good. For example for 2Ps vs. R I am using a (hopefully)
carefully crafted lookup table that includes pawn positions and the pos of the
defending K.
BTW. pos 100 can be faster solved for small connected passed pawn values.
Regards,
Dieter
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