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Subject: Re: an idea for better personality for fruit2.2

Author: Uri Blass

Date: 08:34:04 10/02/05

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On October 02, 2005 at 10:45:43, Bryan Hofmann wrote:

>Setting the NullMove Reduction to 2 gives you the answer in 1 second;
>
>
>  1/11	00:00	         469	0	+0.30	Qh5+ g4
>  2/11	00:00	         669	0	-0.45	Qh5+ g4 Qh4 Rxh1 Qxh1
>  2/12	00:00	       1.036	0	+0.08	Rh2 d7 Qd8
>  3/12	00:00	       1.693	0	+0.32	Rh2 Qb5 Qh3 Qxa5
>  4/15	00:00	       5.810	0	 0.00	Rh2 d7 Qh5+ Kd2 Qh8 Ke2
>  4/16	00:00	       9.742	0	+0.21	Rxd1 Kxd1 Qh1+ Ke2 Qb1 Qc4 Qb2+ Kf1
>  5/16	00:00	      14.284	0	+0.07	Rxd1 Kxd1 Qh1+ Ke2 Qb1 a4 Qd3+ Ke1 Qd4
>  5/17	00:00	      18.434	0	+0.30	Qh5+ g4 Nxg4 Rxh1 Qxh1 Qc3+ Nf6 d7 Qf3+ Kf1
>  6/17	00:00	      29.430	0	+0.19	Qh5+ g4 Nxg4 Rxh1 Qxh1 Qc3+ Nf6 Ng4 Qh4 Nxf6
>Qxf6
>  7/21	00:00	      70.942	0	+0.13	Qh5+ g4 Qh3 Rxh1 Qf3+ Kd2 Qxf2+ Kc1 Qxe3+ Kb2
>Qd4+ Kc2 Nxg4
>  8/21	00:00	     127.629	0	+0.13	Qh5+ g4 Qh3 Rxh1 Qf3+ Kd2 Qxf2+ Kc1 Qxe3+ Kb2
>Qd4+ Kc2 Nxg4
>  9/26	00:01	     281.639	0	+0.08	Qh5+ g4 Qh3 Rxh1 Qf3+ Ke1 Qxh1+ Ke2 Qa1 Qa4
>Qb2+ Kf1 Qd2
>  9/26	00:01	     473.558	0	+0.10	Rxd1 Kxd1 Qh5+ Kd2 Qe5 a4 Qb2+ Nc2 Qb3 Ne3
>Qd3+ Kc1 Qd4
> 10/32	00:02	   1.591.157	790.000	 0.00	Rxd1 Kxd1 Qh5+ Kd2 Qe5 a4 Qb2+ Ke1 Qb1+
>Ke2 Qd3+ Ke1 Kg8 Qc8+ Kg7 Qc6
> 11/32	00:03	   2.349.263	795.111	 0.00	Rxd1 Kxd1 Qh5+ Kd2 Qe5 a4 Qb2+ Ke1 Qb1+
>Ke2 Qd3+ Ke1 Kg8 Qc8+ Kg7 Qc6
> 12/35	00:05	   4.400.978	822.000	 0.00	Rxd1 Kxd1 Qh5+ Kd2 Qe5 a4 Qb2+ Ke1 Qb1+
>Ke2 Qd3+ Ke1 Kg8 Qc8+ Kg7 Qc6
> 13/36	00:09	   7.936.587	862.222	 0.00	Rxd1 Kxd1 Qh5+ Kd2 Qe5 a4 Qb2+ Ke1 Qb1+
>Ke2 Qd3+ Ke1 Kg8 Qc8+ Kg7 Qc6
> 14/39	00:19	  16.292.241	868.889	 0.00	Rxd1 Kxd1 Qh5+ Kd2 Qe5 a4 Qb2+ Ke1 Qb1+
>Ke2 Qd3+ Ke1 Qb1+
> 15/39	00:36	  32.058.729	887.778	 0.00	Rxd1 Kxd1 Qh5+ Kd2 Qe5 a4 Qb2+ Ke1 Qb1+
>Ke2 Qd3+ Ke1 Qb1+
> 16/46	01:16	  68.499.210	900.533	 0.00	Rxd1 Kxd1 Qh5+ Kd2 Qe5 a4 Qb2+ Ke1 Qb1+
>Ke2 Qd3+ Ke1 Qb1+
> 17/53	02:44	 148.437.969	902.866	 0.00	Rxd1 Kxd1 Qh5+ Kd2 Qe5 a4 Qb2+ Ke1 Qb1+
>Ke2 Qd3+ Ke1 Qb1+

Both Rxd1 and Qh5+ are evaluated as 0.00 by Fruit and R=2 cause different order
of moves to prefer Rxd1 and not Qh5+

Fruit is simply lucky here with R=2 when with R=3 it needs to see Qh5 gets a
score of less than 0.00 in order to solve the problem.

Uri

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