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Subject: Re: Mate in 8 ? {Others}

Author: John J. J. Smith

Date: 01:45:05 05/11/05

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On May 11, 2005 at 01:11:34, Dann Corbit wrote:

>On May 10, 2005 at 22:41:09, John Merlino wrote:
>
>>On May 10, 2005 at 21:45:09, Dann Corbit wrote:
>>
>>>On May 10, 2005 at 19:51:26, Pedro Castro wrote:
>>>
>>>>r5k1/pp3r1p/q1p2p1B/3pP2p/8/5RPb/PP1QPP1P/4R1K1 w - - 0 1
>>>>
>>>>DanaSah 1,4 seems to make it better than all the engines, I have proven List
>>>>5,12, Amyan 1,595, The Baron 1.6.0...  He is the unique one that it gives mate
>>>>in 8 (P4 2400 MHz).  It is an error?
>>>>
>>>>Your can download DanaSah in http://danasah.tk/
>>>>
>>>>FEN: r5k1/pp3r1p/q1p2P1B/3p3p/8/5RPb/PP1QPP1P/4R1K1 b - - 0 1
>>>>
>>>>DanaSah v1.4:
>>>>   1	00:00	          85	85	+0,89	Txf6 Txf6 exf6 Dxa2
>>>>   2	00:00	         464	464	+0,89	Txf6 Txf6 exf6 Dxa2
>>>>   3	00:00	       5.342	534.200	+1,07	b4 Txf6 exf6 Dxa2
>>>>   3	00:00	       6.415	641.500	+1,62	b4 c5 Dxd5
>>>>   4	00:00	      23.210	331.571	+1,76	b4 Te8 exf6 Dc4
>>>>   5	00:00	      57.896	413.542	+1,86	b4 Te8 exf6 Te5 Af4
>>>>   6	00:00	     169.109	457.051	+2,01	exf6 Te8 Ag4 Dg5+ Rh8 Ag7+ Rg8
>>>>   6	00:00	     199.801	444.002	+2,09	exf6 Rh8 Dg5 Ag4 Ag7+ Rg8 Ah6+ Rh8
>>>>   7	00:00	     308.343	460.213	+2,24	exf6
>>>>   7	00:00	     378.846	451.007	+3,74	exf6
>>>>   7	00:00	     416.158	447.481	+4,35	exf6 Rh8 Dg5 Dxa2 Dg7+ Txg7 fxg7+ Rg8 Tf8+
>>>>Txf8 gxf8D+
>>>>   8	00:01	     584.051	463.532	+4,20	exf6 Rh8 Dg5 Dxa2 Dg7+ Txg7 fxg7+ Rg8 Tf8+
>>>>Txf8 gxf8D+
>>>>   8	00:01	     666.857	459.901	+4,50	exf6
>>>>   8	00:01	     745.365	457.279	+4,82	exf6 Rh8 Dg5 Af5 Txf5 Dxa2 Ag7+ Rg8 Ah6+
>>>>Rh8 Dxh5
>>>>   9	00:02	   1.377.109	486.610	+4,97	exf6
>>>>   9	00:03	   1.987.520	476.623	+6,47	exf6
>>>>   9	00:04	   2.159.115	484.106	+7,59	exf6 Rh8 Dg5 Af5 Txf5 Dxa2 Dg7+ Txg7 fxg7+
>>>>Rg8 Tf8+ Txf8 gxf8D+
>>>>  10	00:05	   2.716.742	497.571	+7,44	exf6 Rh8 Dg5 Af5 Txf5 Dxa2 Dg7+ Txg7 fxg7+
>>>>Rg8 Tf8+ Txf8 gxf8D+
>>>>  10	00:05	   2.909.010	488.088	+7,74	exf6
>>>>  10	00:06	   3.330.041	496.280	+9,24	exf6
>>>>  10	00:07	   3.968.128	497.883	+12,32	exf6 Rh8 Dg5 Af5 Txf5 Tg8 Ag7+ Tgxg7
>>>>fxg7+ Rg8 Txf7 Db5
>>>>  11	00:09	   4.911.841	505.333	+12,17	exf6 Rh8 Dg5 Af5 Txf5 Tg8 Ag7+ Tgxg7
>>>>fxg7+ Rg8 Txf7 Db5
>>>>  11	00:11	   5.791.612	516.186	+10,67	exf6 Rh8 Dg5 Af5 Txf5 Tg8 Ag7+ Tgxg7
>>>>fxg7+ Rg8 Txf7 Db5
>>>>  11	00:11	   6.018.656	513.537	+12,47	exf6
>>>>  11	00:13	   6.774.866	512.470	+13,97	exf6
>>>>  11	00:14	   7.622.624	508.853	+14,45	exf6 Af5 Txf5 Da3 bxa3 Rh8 Txh5 Rg8 Dd4
>>>>b6 f4
>>>>  12	00:17	   9.204.938	519.173	+14,30	exf6 Af5 Txf5 Da3 bxa3 Rh8 Txh5 Rg8 Dd4
>>>>b6 f4
>>>>  12	00:18	   9.574.997	518.127	+14,60	exf6
>>>>  12	00:19	  10.115.812	519.292	+14,64	exf6 Af5 Txf5 Da3 bxa3 Rh8 Txh5 Tg8 Ag7+
>>>>Tgxg7 fxg7+ Rxg7 Dg5+ Rf8 f4
>>>>  13	00:22	  12.153.939	528.661	+14,49	exf6 Af5 Txf5 Da3 bxa3 Rh8 Txh5 Tg8 Ag7+
>>>>Tgxg7 fxg7+ Rxg7 Dg5+ Rf8 f4
>>>>  13	00:24	  12.730.058	525.167	+14,79	exf6
>>>>  13	00:34	  17.938.793	516.075	+16,29	exf6
>>>>  13	00:49	  25.416.110	518.696	+28,30	exf6 Af5 Txf5 Rh8 Dg5 Da3 bxa3 Tg8 Ag7+
>>>>Tgxg7 fxg7+ Rg8 Txf7 h6 Tf8+ Rh7 g8D+
>>>>  14	01:33	  51.193.427	550.466	+28,45	exf6
>>>>  14	01:34	  51.585.680	548.783	+29,95	exf6
>>>>  14	02:17	  75.019.922	547.590	+M8	exf6 Af5 Txf5 Rh8 Dg5 Da3 Dg7+ Txg7 fxg7+
>>>>Rg8 bxa3 Td8 Tf8+ Txf8 gxf8D+
>>>
>>>It is a mate in 8.  Chest output:
>>>
>>>[D]r5k1/pp3r1p/q1p2p1B/3pP2p/8/5RPb/PP1QPP1P/4R1K1 w - - acn 193074822; acs 531;
>>>bm exf6; ce 32752; dm 8; pv exf6 Bf5 Rxf5 Qa3 Qg5+ Kh8 Qg7+ Rxg7 fxg7+ Kg8 bxa3
>>>h4 Rf8+ Rxf8 gxf8=Q#;
>>>
>>>Considering that it took a dedicated mate solver almost 9 minutes on a fast
>>>machine, I think it is remarkable for you to find it so fast.
>>
>>And, of course, The King finds it in less than one second. :-)
>>
>>Time	Depth	Score	Positions	Moves
>>0:00	1/3	2.51	1892		1.Rxf6 Rxf6 2.exf6 Bf5 3.Qf4 Qa5
>>0:00	1/3	2.97	3696		1.exf6 Kh8 2.Qg5
>>0:00	1/4	7.56	5518		1.exf6 Kh8 2.Qg5 Bf5 3.Rxf5
>>0:00	1/5	11.43	13138		1.exf6 Rc7 2.Qg5+ Kf7 3.Qxh5+ Ke6
>>					4.Re3+ Kd6 5.Qe5+ Kc5 6.Qxc7
>>0:00	1/6	12.11	33526		1.exf6 Kh8 2.Qg5 Rg8 3.Bg7+ Rgxg7
>>					4.fxg7+ Kg8 5.Rxf7
>>0:00	1/7	14.08	69177		1.exf6 Bf5 2.Rxf5 Rd7 3.f7+ Rxf7
>>					4.Qg5+ Kh8 5.Rxf7
>>0:00	1/8	16.46	95567		1.exf6 Bf5 2.Rxf5 Kh8 3.Qg5 Rg8
>>					4.Bg7+ Rgxg7 5.fxg7+ Kg8 6.Rxf7
>>0:00	1/9	Mate08	222741		1.exf6 Bf5 2.Rxf5 Kh8 3.Qg5 Rg8
>>					4.Bg7+ Rgxg7 5.fxg7+ Kg8 6.Rxf7
>>					Qa3 7.Qd8+ Kxf7 8.g8=Q#
>>0:00	1/10	Mate08	272839		1.exf6 Bf5 2.Rxf5 Kh8 3.Qg5 Rg8
>>					4.Bg7+ Rgxg7 5.fxg7+ Kg8 6.Rxf7
>>					Qa3 7.Qd8+ Kxf7 8.g8=Q#
>>0:01	1/11	Mate08	404990		1.exf6 Bf5 2.Rxf5 Kh8 3.Qg5 Rg8
>>					4.Bg7+ Rgxg7 5.fxg7+ Kg8 6.Rxf7
>>					Qa3 7.Qd8+ Kxf7 8.g8=Q#
>>0:01	1/12	Mate08	685978		1.exf6 Bf5 2.Rxf5 Kh8 3.Qg5 Rg8
>>					4.Bg7+ Rgxg7 5.fxg7+ Kg8 6.Rxf7
>>					Qa3 7.Qd8+ Kxf7 8.g8=Q#
>>0:03	1/13	Mate08	1358140		1.exf6 Bf5 2.Rxf5 Kh8 3.Qg5 Rg8
>>					4.Bg7+ Rgxg7 5.fxg7+ Kg8 6.Rxf7
>>					Qa3 7.Qd8+ Kxf7 8.g8=Q#
>>
>>jm
>
>
>Analysis from e:\m8.epd
>5/10/2005 6:47:02 PM Level: 600 Seconds
>Analyzing engine: EngineShredder9UCI
>
>1) exf6; ce 32752; dm 8
>    Searching move: e5xf6
>    Best move (EngineShredder9UCI): e5xf6
>    identical moves! Found in: 00:02
>     2/3	00:00	          91	1.444	+1.30	e5xf6 Qa6xa2
>     3/5+	00:00	         422	6.698	+1.66	e5xf6 Qa6xa2
>     3/5+	00:00	         473	7.507	+2.24	e5xf6 Qa6xa2
>     3/7	00:00	         615	9.761	+2.80	e5xf6 Qa6xa2 Qd2g5+ Kg8h8 Qg5xh5
>     4/7	00:00	       1.274	20.222	+2.80	e5xf6 Qa6xa2 Qd2g5+ Kg8h8 Qg5xh5
>     5/12-	00:00	       2.013	31.952	+2.55	e5xf6 Qa6xa2
>     5/14	00:00	       2.886	37.000	+2.13	e5xf6 Qa6xa2 Qd2g5+ Kg8h8 b2b3 Ra8e8
>     5/14+	00:00	       3.378	43.307	+2.14	Rf3xf6
>     5/14+	00:00	       3.572	45.794	+2.49	Rf3xf6
>     5/14	00:00	       4.416	56.615	+2.49	Rf3xf6 Rf7xf6
>     6/14+	00:00	       9.136	34.345	+2.74	Rf3xf6 Rf7xf6
>     6/14	00:00	      10.245	34.494	+2.80	Rf3xf6 Rf7xf6 e5xf6 Bh3f5 Qd2f4 Bf5g6
>Qf4c7
>     7/15+	00:00	      23.721	68.956	+3.05	Rf3xf6 Rf7xf6
>     7/18+	00:00	      31.518	80.608	+3.55	Rf3xf6 Rf7xf6
>     7/28	00:00	      72.382	149.241	+5.23	Rf3xf6 Rf7xf6 e5xf6 Kg8f7 Qd2g5 Ra8g8
>Qg5xh5+ Rg8g6 Qh5xh3 Qa6xa2
>     8/28+	00:00	     102.743	177.756	+5.48	Rf3xf6 Rf7xf6
>     8/29	00:00	     132.342	201.433	+5.59	Rf3xf6 Rf7xf6 e5xf6 Kg8f7 Qd2g5 Kf7e6
>Qg5g7 h5h4 Qg7e7+ Ke6f5 e2e4+
>     9/36+	00:01	     286.516	286.516	+5.84	Rf3xf6 Rf7xf6
>     9/36+	00:01	     373.970	310.864	+6.34	Rf3xf6 Rf7xf6
>     9/36	00:01	     525.617	343.092	+6.39	Rf3xf6 Rf7xf6 e5xf6 Kg8f7 Qd2g5 Ra8g8
>Qg5xh5+ Rg8g6 Qh5xh3 Qa6xa2 Qh3d7+ Kf7xf6 Qd7xh7 Qa2b3 e2e4
>    10/34	00:02	     724.639	365.057	+6.49	Rf3xf6 Rf7xf6 e5xf6 Kg8f7 Qd2g5 Ra8g8
>Qg5xh5+ Rg8g6 Qh5xh3 Qa6xa2 Qh3d7+ Kf7xf6 Qd7xh7 Qa2b3 e2e4 Qb3xb2 e4xd5
>    10/34+	00:02	     776.189	365.265	+6.50	e5xf6
>    10/34	00:02	     816.496	365.322	+6.84	e5xf6 Bh3f5 Rf3xf5 Kg8h8 e2e4 d5xe4
>    11/24+	00:02	     891.092	367.915	+7.09	e5xf6 Bh3f5
>    11/25+	00:02	     932.805	370.749	+7.59	e5xf6 Bh3f5
>    11/25	00:02	     973.318	370.787	+7.61	e5xf6 Bh3f5 Rf3xf5 Kg8h8 Qd2g5
>    12/29+	00:03	   1.148.193	386.727	+7.86	e5xf6 Bh3f5
>    12/29+	00:03	   1.215.343	388.909	+8.36	e5xf6 Bh3f5
>    12/40+	00:13	   6.368.853	492.259	+M151	e5xf6 Bh3f5 Rf3xf5 Rf7g7 f6xg7
>Qa6xa2 Qd2g5
>    13/28+	00:13	   6.505.704	492.147	+M150	e5xf6 Bh3f5 Rf3xf5 Kg8h8 Qd2g5
>Qa6xe2 Qg5g7+ Rf7xg7
>    14/17+	00:13	   6.522.442	492.817	+M150	e5xf6 Bh3f5 Rf3xf5 Kg8h8 Qd2g5 h5h4
>Qg5g7+ Rf7xg7 f6xg7+ Kh8g8
>    15/44+	00:16	   7.979.633	499.195	+M150	e5xf6 Bh3f5 Rf3xf5 Kg8h8 Qd2g5 Qa6a3
>Qg5g7+ Rf7xg7 f6xg7+ Kh8g8
>    16/48+	02:02	  66.265.393	543.016	+M150	e5xf6 Kg8h8 Qd2g5 Qa6a3 b2xa3 Ra8g8
>Bh6g7+ Rg8xg7 f6xg7+ Kh8g8
>    17/50+	02:57	  96.749.560	544.779	+M150	e5xf6 Qa6d3 e2xd3 Kg8h8 Qd2g5 h5h4
>g3xh4 Bh3g4 Qg5g7+ Rf7xg7
>    18/40+	03:01	  99.107.321	545.811	+M150	e5xf6 Qa6d3 e2xd3 Kg8h8 Qd2g5 Bh3f5
>Rf3xf5 d5d4 Qg5g7+ Rf7xg7 f6xg7+ Kh8g8 Rf5f8+
>    19/42+	03:07	 102.824.522	547.985	+M150	e5xf6 Qa6d3 e2xd3 Kg8h8 Qd2g5 Bh3f5
>Rf3xf5 h5h4 g3xh4 b7b6
>    20/50+	07:41	 254.824.157	551.922	+M150	e5xf6 Qa6d3 e2xd3 Bh3f5 Rf3xf5 a7a5
>Qd2g5+ Kg8h8
>   5/10/2005 6:57:06 PM, Time for this analysis: 00:10:00, Rated time: 00:02
>
>1 of 1 matching moves
>5/10/2005 6:57:06 PM, Total time: 12:10:04 AM
>Rated time: 00:02 = 2 Seconds
>
>--------------------------------------------------------------------------------
>
>Analysis from e:\m8.epd
>5/10/2005 6:47:02 PM Level: Infinite
>Analyzing engine: Spike
>
>1) exf6; ce 32752; dm 8
>    Searching move: e5xf6
>    Best move (Spike): e5xf6
>    identical moves! Found in: 00:00
>      2	00:00	           0	0	+1.04	e5xf6 Qa6xa2
>      2	00:00	           0	0	+1.04	e5xf6 Qa6xa2
>      3	00:00	           0	62.800	+1.90	e5xf6 Qa6xa2 Qd2g5+ Kg8h8 Qg5xh5
>      3	00:00	           0	60.195	+1.90	e5xf6 Qa6xa2 Qd2g5+ Kg8h8 Qg5xh5
>      4	00:00	           0	81.919	+2.45	e5xf6 Ra8e8 Qd2g5+ Kg8h8

What program are you using to generate this output?

John



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