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Subject: Re: Mate in 13 test position

Author: John Merlino

Date: 11:55:48 01/18/05

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On January 18, 2005 at 07:12:36, José Antônio Fabiano Mendes wrote:

>     Please see ==> http://www.chessgames.com/index.html

Excellent game, Eduard!

So, here you are. You have a fantastic attack going, but you're down a piece and
a pawn. How willing is your engine to trade material with Nf3+?

How soon does your engine find this move with a winning (at least +2) score?
Extra credit for announcing Mate. CM9000_R1 on an AMD 2500 announces Mate in 13
in 3:12.

[D]rqb2b1r/pp1p3p/4p3/1N2n1k1/4Q1P1/8/PP5P/1K1R2NR w - - 0 23

Time	Depth	Score	Positions	Moves
0:00	1/3	-2.23	3987		23.Nf3+ Nxf3 24.Rd5+ Kf6 25.Qxf3+
					Ke7 26.Rh5
0:00	1/3	-2.07	7462		23.Ne2 h5 24.Qf4+ Kg6 25.g5
0:00	1/3	-1.65	10514		23.Rf1 Ng6 24.Qe3+ Kxg4 25.Nf3
0:00	1/4	-2.42	17702		23.Rf1 Be7 24.Nf3+ Nxf3 25.Rxf3 Kh6
0:00	1/4	-2.40	21051		23.Ne2 Be7 24.Qf4+ Kg6 25.Rhf1 Kg7
0:00	1/4	-1.99	26607		23.Rc1 Nxg4 24.Nf3+ Kh5 25.Rhg1
0:00	1/5	-2.01	94895		23.Rc1 Nc6 24.h4+ Kh6 25.Qe3+ Kg7
					26.Qg5+ Kf7 27.Nf3
0:00	1/5	0.00	138276		23.Nf3+ Nxf3 24.Qxf3 h5 25.h4+
					Kh6 26.Qf6+ Kh7 27.Qf7+ Bg7 28.Qxh5+
					Kg8 29.Qe8+ Kh7 30.Qh5+
0:01	1/6	1.04	309566		23.Nf3+ Nxf3 24.Qxf3 Bh6 25.Qf7
					Qf4 26.h4+ Kxg4 27.Rdg1+ Kf3 28.Rf1+
					Ke3 29.Rh3+ Ke4 30.Rxf4+ Bxf4
0:03	1/7	4.77	1089893		23.Nf3+ Nxf3 24.Qxf3 Bg7 25.h4+
					Kg6 26.Rhf1 Rf8 27.Qe4+ Kh6 28.g5+
					Kh5 29.Qxh7+ Kg4 30.Rg1+ Kf4 31.Qxg7
0:10	1/8	7.74	3439715		23.Nf3+ Nxf3 24.Qxf3 Qe5 25.h4+
					Kh6 26.Rhe1 Kg7 27.Rxe5 Be7 28.Nd6
					Rf8
0:20	1/9	7.62	6618418		23.Nf3+ Nxf3 24.Qxf3 Qe5 25.h4+
					Kh6 26.Rhe1 Be7 27.Rxe5 Rf8 28.Rh5+
					Kg7 29.Qe3 Kg8 30.Nxa7
0:51	1/10	10.92	16992362	23.Nf3+ Nxf3 24.Qxf3 Qe5 25.h4+
					Kh6 26.Rhe1 Be7 27.Qf7 Qxe1 28.g5+
					Bxg5 29.hxg5+ Kxg5 30.Qg7+ Kf4
					31.Rxe1 Rf8 32.Rf1+ Ke3 33.Qd4+
					Ke2 34.Rxf8
3:12	1/11	Mate13	65729780	23.Nf3+ Nxf3 24.Qxf3 Qe5 25.Qf7
					Qe4+ 26.Ka1 Bd6 27.h4+ Kxg4 28.Nxd6
					Qxh1 29.Rxh1 Rf8 30.Qg7+ Kf3 31.Rf1+
					Ke3 32.Qg3+ Rf3 33.Qxf3+ Kd4 34.Qc3+
					Kd5 35.Rd1#

jm



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