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Subject: Re: Mate in 8 ?

Author: John Merlino

Date: 19:41:09 05/10/05

Go up one level in this thread


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



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