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Subject: Re: chess problem - mate in 20 or so

Author: John Merlino

Date: 18:29:39 04/01/05

Go up one level in this thread


On April 01, 2005 at 20:59:54, Mike Byrne wrote:

>original chess problem derived from a chess game against Hiarcs Palm...
>
>I found it interesting and hope you do too ...
>
>try playing it on your own first before checking with the computer
>
>[d]5r2/1br1qkpQ/2np2p1/p3p1P1/1pPbP3/1P1P4/P2B2K1/3B2NR w - - 0 1
>
>best,
>
>Michael

The King says that it is at least a Mate in 19. This is the CM9_R1 personality
on an AMD 2500, and note that the full PV is not there because The King only
reports 31 plies in the PV:

Time	Depth	Score	Positions	Moves
0:00	1/3	0.00	1842		1.Qxg6+ Kg8 2.Qh7+ Kf7 3.Qg6+
0:00	1/4	0.64	5100		1.Qxg6+ Kg8 2.Qh7+ Kf7 3.Bh5+ Ke6
					4.Bg4+ Kf7 5.Qg6+ Kg8 6.Be6+ Qxe6
					7.Qxe6+ Rcf7 8.Qxd6
0:00	1/5	0.31	19620		1.Qxg6+ Kg8 2.Qh7+ Kf7 3.Bh5+ Ke6
					4.Bg4+ Kf7 5.Qg6+ Kg8 6.Be6+ Qxe6
					7.Qxe6+ Rcf7 8.Nf3
0:00	1/6	12.67	61367		1.Qxg6+ Kg8 2.Qh7+ Kf7 3.Bh5+ Ke6
					4.Bg4+ Kf7 5.Qg6+ Kg8 6.Be6+ Qxe6
					7.Qxe6+ Rcf7 8.g6 Bf2 9.gxf7+ Rxf7
					10.Qe8+ Rf8 11.Rh8+ Kxh8 12.Qxf8+
					Kh7 13.Qxf2
0:00	1/7	13.25	121912		1.Qxg6+ Kg8 2.Qh7+ Kf7 3.Bh5+ Ke6
					4.Bg4+ Kf7 5.Qg6+ Kg8 6.Be6+ Qxe6
					7.Qxe6+ Rcf7 8.g6 Be3 9.gxf7+ Rxf7
					10.Qe8+ Rf8 11.Rh8+ Kxh8 12.Qxf8+
					Kh7 13.Bxe3
0:00	1/8	14.07	276739		1.Qxg6+ Kg8 2.Qh7+ Kf7 3.Bh5+ Ke6
					4.Bg4+ Kf7 5.Qg6+ Kg8 6.Be6+ Qxe6
					7.Qxe6+ Rcf7 8.g6 Be3 9.gxf7+ Rxf7
					10.Qe8+ Rf8 11.Rh8+ Kxh8 12.Qxf8+
					Kh7 13.Bxe3 a4 14.Qxd6 axb3 15.axb3
0:02	1/9	16.58	734049		1.Qxg6+ Kg8 2.Qh7+ Kf7 3.Bh5+ Ke6
					4.Bg4+ Kf7 5.Qg6+ Kg8 6.Be6+ Qxe6
					7.Qxe6+ Rcf7 8.g6 Bc8 9.gxf7+ Rxf7
					10.Qxc8+ Rf8 11.Qe6+ Rf7 12.Qe8+
					Rf8 13.Qxc6 Bc3 14.Qd5+ Rf7 15.Nf3
					Bxd2 16.Nxd2
0:05	1/10	16.64	2195806		1.Qxg6+ Kg8 2.Qh7+ Kf7 3.Bh5+ Ke6
					4.Bg4+ Kf7 5.Qg6+ Kg8 6.Be6+ Qxe6
					7.Qxe6+ Rcf7 8.g6 Bc8 9.gxf7+ Rxf7
					10.Qxc8+ Rf8 11.Qe6+ Rf7 12.Qe8+
					Rf8 13.Qxc6 Rf2+ 14.Kg3 Rf7 15.Qe8+
					Rf8 16.Rh8+
0:15	1/11	19.37	6007488		1.Qxg6+ Kg8 2.Qh7+ Kf7 3.Bh5+ Ke6
					4.Bg4+ Kf7 5.Qg6+ Kg8 6.Be6+ Qxe6
					7.Qxe6+ Rcf7 8.g6 Bc8 9.gxf7+ Rxf7
					10.Qxc8+ Rf8 11.Qe6+ Rf7 12.Qe8+
					Rf8 13.Rh8+ Kxh8 14.Qxf8+ Kh7 15.Nh3
					Be3 16.Bxe3
0:41	1/12	23.50	15874294	1.Qxg6+ Kg8 2.Qh7+ Kf7 3.Bh5+ Ke6
					4.Bg4+ Kf7 5.Qg6+ Kg8 6.Be6+ Qxe6
					7.Qxe6+ Rcf7 8.g6 Bc8 9.gxf7+ Rxf7
					10.Qxc8+ Nd8 11.Qxd8+ Rf8 12.Rh8+
					Kxh8 13.Qxf8+ Kh7 14.Nf3 Be3 15.Bxe3
					d5 16.exd5
2:27	1/13	Mate21	56884431	1.Qxg6+ Kg8 2.Qh7+ Kf7 3.Bh5+ Ke6
					4.Bg4+ Kf7 5.Qg6+ Kg8 6.Be6+ Qxe6
					7.Qxe6+ Rcf7 8.g6 Bc8 9.gxf7+ Rxf7
					10.Qxc8+ Rf8 11.Qe6+ Rf7 12.Nf3
					Be3 13.Bxe3 Nd4 14.Qe8+ Rf8 15.Rh8+
					Kxh8 16.Qxf8+
7:19	2/14	Mate19	170054417	1.Qxg6+ Kg8 2.Qh7+ Kf7 3.Bh5+ Ke6
					4.Bg4+ Kf7 5.Qg6+ Kg8 6.Be6+ Qxe6
					7.Qxe6+ Rcf7 8.g6 Bc8 9.gxf7+ Rxf7
					10.Qxc8+ Rf8 11.Rh8+ Kxh8 12.Qxf8+
					Kh7 13.Nh3 Be3 14.Bxe3 Nd4 15.Ng5+
					Kh6 16.Ne6+

jm



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