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Subject: Re: Rebel Century.......Better watch out for Aristarch ..!!

Author: John Merlino

Date: 21:45:56 08/06/02

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On August 06, 2002 at 14:37:59, Art Basham wrote:

>Remember the neat "test move" played only by the Rebel Century programs?
>Ra3..?
>
>Well, lo and behold the new Aristarch engine finds it at only 8 ply
>on my machine..!
>
> One min, and 55 sec.
>
>[D]r2q1r1k/2n1bppp/1pp1p3/p3P3/PnRPN1Q1/4B3/1P1N1PPP/R5K1 w - -
>
>Here is teh diag. if you want to do some more testing...

"Only played by the Rebel Century programs"? Not so sure about that....
Chessmaster 9000, on a PIII-733, finds Ra3 after nine seconds, but at 0:23 it
leaves it until 1:04, when it goes back to it and sticks with it:

Time	Depth	Score	Positions	Moves
0:01	1/6	0.22	51630		1.Rcc1 Ncd5 2.Ra3 Na6 3.Bg5 f5
					4.Bxe7 Qxe7
0:02	1/7	0.15	168252		1.Rcc1 Ncd5 2.Bg5 Bxg5 3.Nxg5 Kg8
					4.Ra3
0:07	1/8	0.32	525991		1.Rcc1 Qd7 2.Bg5 Bxg5 3.Nxg5 h6
					4.Qh4 Ncd5 5.Ra3
0:09	1/8	0.35	659641		1.Ra3 Ncd5 2.Rc1 Rc8 3.Nc4 Qd7
					4.Ncd6 Bxd6 5.Nxd6
0:18	1/9	0.05	1399647		1.Ra3 Nbd5 2.Rd3 Nb4 3.Rb3 Ncd5
					4.Rc1 Qd7 5.Bg5 Bxg5 6.Qxg5
0:23	1/9	0.18	1826663		1.Rcc1 Qd7 2.Qh3 Ncd5 3.Bg5 Rfd8
					4.Bxe7 Qxe7 5.Qg3
0:28	1/9	0.23	2277895		1.Bg5 Bxg5 2.Nxg5 Qe7 3.Ra3 Ncd5
					4.Rc1 f5 5.Qh4
0:42	1/10	0.25	3550287		1.Bg5 Bxg5 2.Nxg5 Qe7 3.Ra3 Ncd5
					4.Rc1 f5 5.Qh4 h6
1:04	1/10	0.35	5414275		1.Ra3 Qd7 2.Bg5 f5 3.exf6ep gxf6
					4.Bf4 Rg8 5.Qh5 Ncd5 6.Rh3
2:30	2/11	0.24	12525490	1.Ra3 Ncd5 2.Bg5 Bxg5 3.Nxg5 Qe7
					4.Rh3 h6 5.Nge4 Rfd8 6.Rg3 g6 7.Nd6
5:52	3/12	0.35	29091621	1.Ra3 Ncd5 2.Bg5 Bxg5 3.Nxg5 Qe7
					4.Rc1 Rad8 5.Nge4 Qd7 6.Nd6 f5

jm



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