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Subject: Re: Difficult mate for programs

Author: Roy Brunjes

Date: 15:42:20 10/12/02

Go up one level in this thread


On October 12, 2002 at 13:29:35, John Merlino wrote:

>On October 12, 2002 at 06:04:44, Rex wrote:
>
>>Ruffian results on a 1.533Ghz computer.
>>
>>00:00:01.2	18.15	8	1415595	Ne5+ Kb6 Bc5+ Qxc5 Nd7+ Ka7 Qxc5+ Ka8
>>00:00:02.8	18.47	9	3368004	Ne5+ Kb6 Bc5+ Qxc5 Nd7+ Ka7 Qxc5+ Ka8
>>00:00:06.3	18.74	10	7688982	Ne5+ Kb6 Bc5+ Qxc5 Nd7+ Ka7 Qxc5+ Ka8
>>00:00:13.0	19.09	11	15529183	Ne5+
>>00:00:16.7	 Mate in 11	11	19957155	Ne5+ Kb6 Bc5+ Qxc5 Nd7+ Ka7 Qxc5+ Ka8 Qxc7
>>Rhd8 Nb6+ Ka7 Na3 Rd6 Nxb5+ axb5 Nc8+ Ka8 Qa5+ Ra6 Qxa6+ Bxa6 Ra7#
>>00:00:36.8	 Mate in 11	12	44015534	Ne5+ Kb6 Bc5+ Qxc5 Nd7+ Ka7 Qxc5+ Ka8 Qxc7
>>Rhd8 Nb6+ Ka7 Na3 Rd6 Nxb5+ axb5 Nc8+ Ka8 Qa5+ Ra6 Qxa6+ Bxa6 Ra7#
>>00:01:39.7	 Mate in 11	13	117956879	Ne5+ Kb6 Bc5+ Qxc5 Nd7+ Ka7 Qxc5+ Ka8 Qxc7
>>Rhd8 Nb6+ Ka7 Na3 Rd6 Nxb5+ axb5 Nc8+ Ka8 Qa5+ Ra6 Qxa6+ Bxa6 Ra7#
>
>Chessmaster 9000, on a PIII-733 (since I'm at home), finds Mate in 12 in
>1:04....
>
>Time	Depth	Score	Positions	Moves
>0:00	1/3	16.25	1948		1.Ne5+ Qxe5 2.Bxe5 Rhd8 3.Rxc7+
>					Kb6 4.Qc5+ Ka5 5.Qa3+ Kb6 6.Rxf7
>0:00	1/4	15.95	10179		1.Ne5+ Qxe5 2.Bxe5 Rhd8 3.Qe4+
>					Rd5 4.Bxg7
>0:00	1/5	17.47	58780		1.Ne5+ Kb6 2.Bc5+ Qxc5 3.Nd7+ Ka7
>					4.Qxc5+ Ka8 5.Nxb8 Rxb8 6.Qxc7
>0:01	1/6	18.09	111671		1.Ne5+ Kb6 2.Bc5+ Qxc5 3.Nd7+ Ka7
>					4.Qxc5+ Ka8 5.Nxb8 Rxb8 6.Qxc7
>					b4 7.Rxf7
>0:03	1/7	18.09	277981		1.Ne5+ Kb6 2.Bc5+ Qxc5 3.Nd7+ Ka7
>					4.Qxc5+ Ka8 5.Nxb8 Rxb8 6.Qxc7
>					b4 7.Rxf7
>0:08	1/8	19.63	807078		1.Ne5+ Kb6 2.Bc5+ Qxc5 3.Nd7+ Ka7
>					4.Qxc5+ Ka8 5.Na3 Bxg2 6.Nxb8 Rxb8
>					7.Kxg2 Rc8 8.Qc6+ Kb8 9.Qxa6
>0:22	1/9	20.39	2451949		1.Ne5+ Kb6 2.Bc5+ Qxc5 3.Nd7+ Ka7
>					4.Qxc5+ Ka8 5.Na3 Bf3 6.Nxb8 Rxb8
>					7.gxf3 Rc8 8.Qc6+ Kb8 9.Qxa6
>1:04	1/10	Mate12	7658533		1.Ne5+ Kb6 2.Bc5+ Qxc5 3.Nd7+ Ka7
>					4.Qxc5+ Ka8 5.Na3 Bf3 6.Qxc7 Rb7
>					7.Qa5 Ka7 8.Nxb5+ Rxb5 9.Nc5+ Rb7
>					10.Qxa6+ Kb8 11.Rxb7+ Bxb7 12.Qxb7#
>4:02	2/11	Mate12	27851982	1.Ne5+ Kb6 2.Bc5+ Qxc5 3.Nd7+ Ka7
>					4.Qxc5+ Ka8 5.Na3 Bf3 6.Qxc7 Rb7
>					7.Qa5 Ka7 8.Nxb5+ Rxb5 9.Nc5+ Ka8
>					10.Qxa6+ Kb8 11.Qa7+ Kc8 12.Qc7#
>
><BEGIN CONSPIRACY THEORY>
>I see that Ruffian has the same "problem" as the Tigers, in that Mate in N
>reports are one move less than the actual number of moves. And the output format
>is very similar to the Tigers. Hmmmm.....
><END CONSPIRACY THEORY>
>
>:-)
>
>jm

Here is CM9000 on slightly faster hardware:  AMD 1.5 Ghz w/ 256 MB Hashtables

Time	Depth	Score	Positions	Moves
0:00	1/4	15.95	10179		1.Ne5+ Qxe5 2.Bxe5 Rhd8 3.Qe4+
					Rd5 4.Bxg7
0:00	1/5	17.47	58780		1.Ne5+ Kb6 2.Bc5+ Qxc5 3.Nd7+ Ka7
					4.Qxc5+ Ka8 5.Nxb8 Rxb8 6.Qxc7
0:00	1/6	18.09	111671		1.Ne5+ Kb6 2.Bc5+ Qxc5 3.Nd7+ Ka7
					4.Qxc5+ Ka8 5.Nxb8 Rxb8 6.Qxc7
					b4 7.Rxf7
0:01	1/7	18.09	277981		1.Ne5+ Kb6 2.Bc5+ Qxc5 3.Nd7+ Ka7
					4.Qxc5+ Ka8 5.Nxb8 Rxb8 6.Qxc7
					b4 7.Rxf7
0:03	1/8	19.63	807078		1.Ne5+ Kb6 2.Bc5+ Qxc5 3.Nd7+ Ka7
					4.Qxc5+ Ka8 5.Na3 Bxg2 6.Nxb8 Rxb8
					7.Kxg2 Rc8 8.Qc6+ Kb8 9.Qxa6
0:08	1/9	20.39	2451918		1.Ne5+ Kb6 2.Bc5+ Qxc5 3.Nd7+ Ka7
					4.Qxc5+ Ka8 5.Na3 Bf3 6.Nxb8 Rxb8
					7.gxf3 Rc8 8.Qc6+ Kb8 9.Qxa6
0:24	1/10	Mate12	7580695		1.Ne5+ Kb6 2.Bc5+ Qxc5 3.Nd7+ Ka7
					4.Qxc5+ Ka8 5.Na3 Bf3 6.Qxc7 Rb7
					7.Qa5 Ka7 8.Nxb5+ Rxb5 9.Nc5+ Rb7
					10.Qxa6+ Kb8 11.Rxb7+ Bxb7 12.Qxb7#

Roy



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