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Subject: Re: An interesting mate...........opps...............

Author: Uri Blass

Date: 22:26:32 10/10/01

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On October 11, 2001 at 00:10:49, Rex wrote:

>
>
>Using GT-2 with my personnal settings I find mate in 7 moves.  Of course running
>only 3 minutes of analysis.
>
>1.533Ghz
>
>00:00:00.7	9.18	10	211004	Rxe5
>00:00:00.0	13.04	10	215706	Rxe5 Qf3 Ree1 Qxd1
>00:00:01.7	13.94	11	687474	Rxe5
>00:00:10.2	 Mate in 8	11	5204472	Rxe5 Qf3 Ree1 a3
>00:00:13.6	 Mate in 8	12	7033449	Rxe5 Qf3 Ree1 a3
>00:02:58.7	 Mate in 7	13	96264402	Rxe5 Qf3 Ree1 a3

Chest verifies in a short time on p200 that mate in 8 moves is the shortest
mate(only 465 seconds 10,940,121 nodes,pv 1...Rxe5 2.Qf3 Ree1 3.c4 Rg1+ 4.Kf2
Rde1 5.Qg3 Ref1+ 6.Ke2 Rxg3 7.gxf5 Qe3+ 8.Kxf1 Rg1#)

It is also clear that when your Gambittiger 2 says mate in 7 it means mate in 8.

It was also wrong in the previous case when it said mate in 9 and there was only
mate in 10 based on chest.

I guess that chest can find that mate in 8 is the shortest mate on your hardware
even faster than Gambittiger 2.

Uri



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