BT2630 position 15

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jdart
Posts: 3730
Joined: Fri Mar 10, 2006 4:23 am
Location: http://www.arasanchess.org

BT2630 position 15

Post by jdart » Fri Dec 28, 2018 9:56 pm



bm is supposed to be e5 but I am getting a score over +8 from Rf6+:

27 4.56 e5 +3.74 27132810
28 5.60 e5! +3.93 33318722
28 7.58 e5 +3.96 45187941
29 10.32 -- +3.77 61567701
29 11.33 e5 +3.98 67630954
30 16.79 e5 +3.94 98750692
31 18.21 e5! +4.12 106234313
31 21.28 e5! +4.50 122861537
31 28.90 e5 +5.20 166132356
32 36.90 e5 +5.34 214817493
33 43.69 e5! +5.53 251798851
33 53.64 e5 +5.63 306676397
34 61.69 e5 +5.48 353526637
35 69.13 e5! +5.67 396511375
35 91.22 e5! +6.05 518170176
35 103.87 e5 +5.90 595445947
36 119.00 e5! +6.09 679938888
36 139.46 e5 +6.04 805458716
37 163.11 e5! +6.23 939104029
37 226.39 e5! +6.60 1310208675
37 302.89 Rf6+ +6.73 1751212225
38 317.11 Rf6+! +6.91 1831945157
38 352.99 Rf6+! +7.29 2048721949
38 417.57 Rf6+ +7.30 2442736371
39 459.53 Rf6+! +7.48 2695740214
39 501.62 Rf6+ +7.48 2951861887
40 608.71 Rf6+! +7.67 3614559992
40 709.36 Rf6+! +8.05 4243830632
6.03M nodes/second.
20899 tablebase probes, 20899 tablebase hits
result: Rf6+ score: +8.05 ** not solved in 900 secs. (5431M nodes)
Rf6+ Kg7

MikeB
Posts: 3050
Joined: Thu Mar 09, 2006 5:34 am
Location: Pen Argyl, Pennsylvania

Re: BT2630 position 15

Post by MikeB » Fri Dec 28, 2018 10:59 pm

jdart wrote:
Fri Dec 28, 2018 9:56 pm


bm is supposed to be e5 but I am getting a score over +8 from Rf6+:

27 4.56 e5 +3.74 27132810
28 5.60 e5! +3.93 33318722
28 7.58 e5 +3.96 45187941
29 10.32 -- +3.77 61567701
29 11.33 e5 +3.98 67630954
30 16.79 e5 +3.94 98750692
31 18.21 e5! +4.12 106234313
31 21.28 e5! +4.50 122861537
31 28.90 e5 +5.20 166132356
32 36.90 e5 +5.34 214817493
33 43.69 e5! +5.53 251798851
33 53.64 e5 +5.63 306676397
34 61.69 e5 +5.48 353526637
35 69.13 e5! +5.67 396511375
35 91.22 e5! +6.05 518170176
35 103.87 e5 +5.90 595445947
36 119.00 e5! +6.09 679938888
36 139.46 e5 +6.04 805458716
37 163.11 e5! +6.23 939104029
37 226.39 e5! +6.60 1310208675
37 302.89 Rf6+ +6.73 1751212225
38 317.11 Rf6+! +6.91 1831945157
38 352.99 Rf6+! +7.29 2048721949
38 417.57 Rf6+ +7.30 2442736371
39 459.53 Rf6+! +7.48 2695740214
39 501.62 Rf6+ +7.48 2951861887
40 608.71 Rf6+! +7.67 3614559992
40 709.36 Rf6+! +8.05 4243830632
6.03M nodes/second.
20899 tablebase probes, 20899 tablebase hits
result: Rf6+ score: +8.05 ** not solved in 900 secs. (5431M nodes)
Rf6+ Kg7
both moves look good to me...I prefer Rf6

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 40	+10.26 	16.3G	7:45.02	Rf6+ Kg7 e5 dxe5 Qd3 e4 Qc3 Kh7 Rd6 Bg7 Nf6+ Kh8 Qd2 Nxc4 Qg5 Ne5 Rd8 Nf3+ Kh1 Nxg5 Rxe8+ Bf8 Rxf8+ Kg7 Rxc8 Ne6 Nxh5+ Kf7 Ra8 Ke7 Rxa7+ Kd6 Rb7 e3 Rxb6+ Ke7 Kg2 e2 Kf2 Kf7 Rc6 Ke7 Nf4 Nd8 Rxc5 Kd6 Rc3 Nb7 Rc6+ Kd7 Nxe2 Nd8 Rc3 
 40	+10.21!	15.1G	7:13.20	Rf6+! 
 40	+10.11!	14.2G	6:48.38	Rf6+! 
 40	+10.05!	13.9G	6:42.55	Rf6+! 
 39	+9.99 	12.9G	6:12.54	e5 Qxe5 Re2 Bh3 Qe1 Bg4 Rxe5 dxe5 Qe4+ Kf7 Qxe5 Bg7 Qe7+ Kg8 Qe8+ Kh7 Qe4+ Kh8 Ne7 Nb3 Qa8+ Kh7 Qg8+ Kh6 Qf7 Kh7 Nf5 Bxf5 Qxf5+ Kg8 Qd5+ Kh8 Qd8+ Kh7 Qd3+ Kh6 Qxb3 Bf6 Qf3 Kg6 Qd3+ Kh6 Qe4 Bb2 Qe6+ Kh7 Qf7+ Kh8 Qxa7 Bg7 Qb8+ Kh7 
 39	+9.89!	11.2G	5:28.21	Rf6+! 
 39	+9.66!	9.48G	4:39.33	e5! 
 39	+9.48!	7.84G	3:52.98	Rf6+! 
 39	+9.35!	7.20G	3:34.98	e5! 
 39	+9.26!	7.14G	3:33.26	e5! 
 39	+9.19!	6.66G	3:19.39	e5! 
 38	+9.13 	5.69G	2:51.04	e5 Qxe5 Re2 Qd4 Ne7+ Kg7 Nxc8 Be3 Nxd6 Bg1+ Qxg1 Qxg1+ Kxg1 Kg6 Re7 Kf6 Re3 Kg7 Rf3 Kg6 Kg2 Kh6 Rf7 Kg6 Rxa7 Nb3 Kg1 Kf6 Ra6 Ke7 Rxb6 Na5 Ra6 Nb3 Rc6 Na5 Nf5+ Kf8 Rc8+ Kf7 Rxc5 Kg6 Nd6 Nb3 Rg5+ Kf6 Rxh5 
 38	+9.06!	5.22G	2:37.35	Rf6+! 
 38	+8.97!	4.87G	2:27.04	Rf6+! 
 38	+8.91!	4.70G	2:22.08	Rf6+! 
 37	+8.85!	4.21G	2:07.83	Rf6+! 
 37	+8.79!	3.90G	1:58.61	Rf6+! 
 36	+8.73 	3.50G	1:46.85	Rf6+ Kg7 e5 dxe5 Qd3 e4 Qc3 Kh7 Rd6 Bg7 Nf6+ Kh8 Qd2 Nxc4 Qg5 Ne5 Rd8 Nf3+ Kh1 Nxg5 Rxe8+ Bf8 Rxf8+ Kg7 Rxc8 Nf7 Nxh5+ Kg6 Nf4+ Kf5 h5 Kf6 Rc6+ Kg7 Kg2 Ne5 Re6 Nf3 Rg6+ Kh8 Nd5 Ne5 Re6 Nf7 Rxe4 Nh6 Re7 Ng4 Rxa7 Kg8 Rc7 Kh8 Nxb6  
 36	+8.70!	3.33G	1:41.91	Rf6+! 
 36	+8.61!	3.06G	1:34.04	Rf6+! 
 36	+8.55!	2.92G	1:29.85	Rf6+! 
 35	+8.48 	2.52G	1:17.86	Rf6+ Kg7 e5 dxe5 Qd3 Bd7 Nc7 Kxf6 Nxe8+ Bxe8 Qd6+ Kf5 Qxh6 Bf7 Qg7 Be6 Qh7+ Kf6 Qxh5 Nxc4 Qg5+ Kf7 h5 Nd6 Qxe5 Ke7 Qg7+ Nf7 h6 Bf5 h7 Bxh7 Qxh7 Kf6 Qh4+ Ke6 Qg4+ Ke5 Qg7+ Ke6 Qg6+ Ke7 Qe4+ Kf6 Qc6+ Ke5 Qe8+ Kf6 Qd7 Kg6 Qxa7 Kg7 
 35	+8.36!	2.23G	1:09.29	Rf6+! 
 35	+8.26!	2.12G	1:05.99	Rf6+! 
 35	+8.20!	1.99G	1:02.05	Rf6+! 
 34	+8.14 	1.78G	0:55.81	Rf6+ Kg7 e5 dxe5 Qd3 e4 Qc3 Kh7 Rd6 Bg7 Nf6+ Kh8 Qd2 Nxc4 Qg5 Ne5 Rd8 Nf3+ Kh1 Nxg5 Rxe8+ Bf8 Rxf8+ Kg7 Rxc8 Nf7 Nxh5+ Kg6 Nf4+ Kf6 Rc6+ Kf5 h5 e3 Rc7 Nh6 Kg2 c4 Rxa7 c3 Rc7 Kg4 Rc6 c2 Rxc2 Nf5 Rc4 Kg5 Rc6 Nd4 Rxb6 e2 Kf2 
 34	+8.08!	1.61G	0:50.66	Rf6+! 
 34	+8.02!	1.51G	0:47.88	Rf6+! 
 33	+7.95 	1.34G	0:42.79	Rf6+ Kg7 e5 dxe5 Qd3 e4 Qc3 Kh7 Rd6 Bg7 Nf6+ Kh8 Qd2 Nxc4 Qg5 Ne5 Rd8 Nf3+ Kh1 Nxg5 Rxe8+ Bf8 Rxf8+ Kg7 Rxc8 Nf7 Nxh5+ Kg6 Nf4+ Kf5 h5 e3 Rc7 Nh6 Kg2 Ke4 Rc6 e2 Nxe2 Nf7 h6 Kd3 Nf4+ Kc4 h7 Kb3 Rc7 Nh8 Rxa7 Kb2 Nd5 Ng6 
 33	+7.88!	1.22G	0:39.03	Rf6+! 
 33	+7.82!	1.06G	0:33.99	Rf6+! 
 32	+7.76 	983.0M	0:31.67	Rf6+ Kg7 e5 dxe5 Qd3 Bd7 Nc7 Kxf6 Nxe8+ Bxe8 Qd6+ Kg7 Qxe5+ Kf8 Qf6+ Bf7 Qxh6+ Ke8 Qd6 Nxc4 Qb8+ Ke7 Qxa7+ Ke6 a5 bxa5 b6 Nd6 b7 Nxb7 Qxb7 c4 Qc8+ Kf6 Qd8+ Ke6 Qxa5 Kf6 Qg5+ Ke6 Qf4 Ke7 Qc7+ Kf6 g4 Kg7 gxh5 
 32	+7.71!	864.3M	0:28.04	Rf6+! 
 32	+7.58!	768.4M	0:25.06	Rf6+! 
 32	+7.48!	726.6M	0:23.76	Rf6+! 
 32	+7.42!	670.6M	0:22.05	Rf6+! 
 31	+7.36 	605.2M	0:19.99	Rf6+ Kg7 e5 dxe5 Qd3 e4 Qc3 Kh7 Rd6 Bg7 Nf6+ Kh8 Qd2 Nxc4 Qg5 Ne5 Rd8 Nf3+ Kh1 Nxg5 Rxe8+ Bf8 Rxf8+ Kg7 Rxc8 Ne6 Nxh5+ Kg6 Nf4+ Kf5 Nxe6 Kxe6 Kg2 e3 Rc6+ Ke7 Kf1 c4 Rxc4 Kd6 Ke2 Kd7 Kf3 Kd8 Kxe3 Kd7 
 31	+7.23!	544.0M	0:18.10	Rf6+! 
 31	+7.10!	535.9M	0:17.84	Rf6+! 
 31	+7.01!	524.9M	0:17.50	Rf6+! 
 31	+6.95!	507.9M	0:16.96	Rf6+! 
 30	+6.88 	422.0M	0:14.24	Rf6+ Kg7 e5 dxe5 Qd3 e4 Qc3 Kh7 Rd6 Bg7 Nf6+ Kh8 Qd2 Nxc4 Qg5 Ne5 Rd8 Nf3+ Kh1 Nxg5 Rxe8+ Bf8 Rxf8+ Kg7 Rxc8 Kxf6 hxg5+ Kxg5 Kg2 Kf5 Rc7 Ke5 Rxa7 e3 Rb7 Kd4 Rxb6 c4 Rc6 Kd3 Kf3 e2 Rd6+ Kc2 Kxe2 Kb2 Rc6 h4 gxh4 
 29	+6.91 	356.6M	0:12.16	Rf6+ Kg7 e5 dxe5 Qd3 e4 Qc3 Kh7 Rd6 Bg7 Nf6+ Kh8 Qd2 Nxc4 Qg5 Ne5 Rd8 Nf3+ Kh1 Nxg5 Rxe8+ Bf8 Rxf8+ Kg7 Rxc8 Ne6 Nxh5+ Kg6 Nf4+ Kf5 Kg2 e3 Nxe6 Kxe6 Rc7 Kd5 Rxa7 Kc4 Kf3 Kd3 Rd7+ Kc4 Kxe3 Kb3 Ra7 Kc2 
 29	+6.75!	321.9M	0:11.04	Rf6+! 
 29	+6.62!	287.0M	0:09.93	e5! 
 29	+6.53!	279.4M	0:09.68	e5! 
 29	+6.46!	267.9M	0:09.32	e5! 
 28	+6.40 	246.2M	0:08.59	e5 dxe5 Rf6+ Kg7 Qd3 e4 Qc3 Kh7 Rd6 Bg7 Nf6+ Kh8 Qd2 Nxc4 Qg5 Ne5 Rd8 Nf3+ Kh1 Nxg5 Rxe8+ Bf8 hxg5 Bf5 Rxf8+ Kg7 Rg8+ Kf7 Kg2 c4 Kf2 c3 Ra8 Kg6 Rxa7 Kxg5 Nd5 h4 gxh4+ Kxh4 
 28	+6.29!	238.3M	0:08.32	e5! 
 28	+6.11!	226.0M	0:07.90	Rf6+! 
 28	+5.98!	217.7M	0:07.62	Rf6+! 
 28	+5.89!	210.7M	0:07.38	e5! 
 28	+5.83!	207.4M	0:07.26	e5! 
 27	+5.76 	192.1M	0:06.73	e5 dxe5 Rf6+ Kg7 Qd3 e4 Qc3 Kh7 Rd6 Bg7 Nf6+ Kh8 Qe3 Qe7 Qg5 Bg4 Qg6 Bxf6 Rxf6 e3 Qh6+ Kg8 Rg6+ Kf7 Rg7+ Ke8 Rxe7+ Kxe7 Qxe3+ Kd8 Qh6 Kc7 Qg7+ Kb8 Kg2 Nb3 Qf8+ Kb7 Qf7+ Kb8 
 27	+5.72!	187.4M	0:06.56	Rf6+! 
 27	+5.48!	182.1M	0:06.38	Rf6+! 
 27	+5.31!	178.8M	0:06.26	Rf6+! 
 27	+5.18!	177.2M	0:06.21	Rf6+! 
 27	+5.08!	175.5M	0:06.15	Rf6+! 
 27	+5.02!	173.9M	0:06.09	Rf6+! 
 26	+4.96 	132.0M	0:04.65	Rf6+ Kg7 e5 dxe5 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Nxc4 Rxh5 Bg4 Rh7+ Ke6 Nc3 Bf3 Kg1 e4 Kf2 Bg4 Nxe4 Bf5 Ng5+ Kd5 Rxa7 Bg4 Ra8 Kd4 Rh8 Kc3 h5 Kb4 h6 Kxa4 h7 Kxb5 
 26	+4.95!	118.3M	0:04.16	Rf6+! 
 26	+4.89!	103.0M	0:03.62	Rf6+! 
 25	+4.83 	79.9M  	0:02.82	Rf6+ Kg7 e5 dxe5 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Nxc4 Rxh5 Nd6 Rxe5 Be6 Nc3 Nf5 Kg2 Kf6 Re2 Nd4 Re4 Bf5 Re8 Bg6 Nd5+ Kf7 Re7+ Kf8 Kf2 Bf7 Rd7 Be6 Rd8+ Kg7 Ne3 Nf5 Ra8 Nxe3 
 24	+4.62 	45.3M  	0:01.61	Rf6+ Kg7 e5 dxe5 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Nxc4 Rxh5 Be6 Nc3 Kg6 Rg5+ Kh6 g4 Bf7 Kg3 Bg6 Nd5 Bf7 Nf6 Be6 Ne4 Bd5 Nc3 Bf7 Rf5 Bg6 Rf6 Kg7 Rc6 Bc2 Rc7+ Kg6 Rxa7 
 23	+4.50 	28.9M  	0:01.03	Rf6+ Kg7 e5 dxe5 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Nxc4 Rxh5 e4 Rh7+ Ke6 Nf4+ Kd6 h5 Ne5 h6 Ng4+ Kg2 c4 Rg7 Nxh6 Rg6+ Kc5 Rc6+ Kb4 Rxc8 e3 Kf3 Kxa4 Rxc4+ Kxb5 
 22	+4.35 	17.3M  	0:00.63	Rf6+ Kg7 e5 dxe5 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Nxc4 Rxh5 Ke6 Nc3 Ne3 Rh7 Bd7 Rg7 Nf5 Rg8 Ne3 Ra8 Nd5 Nxd5 Kxd5 Rxa7 Be8 a5 bxa5 b6 Kc6 b7 Kc7 
 21	+4.23 	10.7M  	0:00.39	e5 dxe5 Rf6+ Kg7 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Nxc4 Rxh5 Nd6 Rxe5 Be6 Nc3 Nf5 Kg2 Kf6 Re1 Nd4 Kf2 Bg8 g4 Be6 Kg3 
 20	+4.19 	9.01M  	0:00.32	Rf6+ Kg7 e5 dxe5 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Nxc4 Rxh5 Bg4 Rh7+ Ke6 Nc3 Bf3 Kg1 e4 Kf2 Kf5 Rf7+ Ke5 Rxa7 Kd4 Ne2+ Bxe2 Kxe2 
 19	+4.02 	5.48M  	0:00.20	Rf6+ Kg7 e5 dxe5 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Bg4 Rh7+ Ke6 Ne3 Be2 Rxa7 Nxc4 Nxc4 Bxc4 Rb7 e4 Rxb6+ Kd5 Kg2 Kd4 Rd6+ Bd5 b6 Ke5 Rd7 
 18	+3.95 	2.96M  	0:00.11	e5 dxe5 Rf6+ Kg7 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Nxc4 Rxh5 Ke6 Nc3 a6 bxa6 Bxa6 g4 Nd6 Rh6+ Kd7 Kg3 b5 axb5 Bxb5 
 17	+3.82 	1.32M  	0:00.05	e5 dxe5 Rf6+ Kg7 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Nxc4 Rxh5 Kg6 Rg5+ Kf7 h5 Bb7 Nc3 Nd2 Kh3 Ne4 Nxe4 Bxe4 
 16	+3.67 	904319	0:00.03	e5 dxe5 Rf6+ Kg7 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Nxc4 Rxh5 Be6 Nc3 Kg6 g4 Kf7 Kg3 Ne3 Rg5 Nxg4 Rxg4 
 15	+3.65 	745358	0:00.03	e5 dxe5 Rf6+ Kg7 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Nxc4 Rxh5 Be6 Nc3 Kg6 g4 
 14	+3.44 	465413	0:00.02	e5 dxe5 Rf6+ Kg7 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Nxc4 Rxh5 Bg4 Rh7+ Ke6 Nc3 Bf5 Rxa7 e4 Ne2 Kd5 Rf7 Be6 
 13	+3.47 	318484	0:00.01	e5 dxe5 Rf6+ Kg7 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Bg4 Rh7+ Kg6 Rxa7 Nxc4 
 12	+3.19 	222876	0:00.01	e5 dxe5 Rf6+ Kg7 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Nxc4 Rxh5 Be6 
 11	+3.03 	214648	0:00.01	e5 dxe5 Rf6+ Kg7 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Bg4 Ne3 Kg7 Rd6 Be2 Rd7+ Kh6 Re7 Nxc4 Nxc4 Bxc4 
 10	+3.07 	94206  	0:00.00	e5 dxe5 Rf6+ Kg7 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Nxc4 Rh7+ Kg6 
  9	+2.93 	75507  	0:00.00	Rf6+ Kg7 Rxd6 Qe5 Rd8 Be6 Ra8 Kg6 Rxa7 
  8	+2.89 	62949  	0:00.00	Rf6+ Kg7 Rxd6 Qe5 Rd8 Be6 Ra8 Kg6 
  7	+2.89 	41772  	0:00.00	Rf6+ Kg7 Rxd6 Qe5 
  6	+2.49 	21673  	0:00.00	e5 dxe5 Rf6+ Kg7 Rd6 
  5	+0.49 	17164  	0:00.00	Kg1 Kg7 Rf6 Be6 Rf3 
  4	+0.44 	13857  	0:00.00	Nf6 Qe5 Nd5 Nb3 Rf6+ Kg7 
  3	+0.84 	6239    	0:00.00	Qa1 Nxc4 Rf1 
  2	+7.68 	2706    	0:00.00	Nf6 d5 
  1	+7.61 	1254    	0:00.00	Nf6 
  0	#

User avatar
Eelco de Groot
Posts: 4076
Joined: Sun Mar 12, 2006 1:40 am
Location: Groningen

Re: BT2630 position 15

Post by Eelco de Groot » Fri Dec 28, 2018 11:43 pm

Hi jon and Mike, as far as I can see both moves are interchangeable in what order they are played; transposing


-

Engine: Kaissa IV search 041 (one thread, i7 6700, 512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott

48 59:01 +12.42 1.Rf6+ Kg7 2.e5 dxe5 3.Qd3 e4 4.Qc3 Kh7
5.Rd6 Bg7 6.Nf6+ Kh8 7.Qc1 Qe7 8.Qg5 Bg4
9.Qg6 Bxf6 10.Rxf6 e3 11.Qh6+ Kg8
12.Rg6+ Kf7 13.Rg7+ Ke8 14.Rxe7+ (9.391.470.506) 2652

48 59:01 +12.42 1.e5 dxe5 2.Rf6+ Kg7 3.Qd3 e4 4.Qc3 Kh7
5.Rd6 Bg7 6.Nf6+ Kh8 7.Qc1 Qe7 8.Qg5 Bg4
9.Qg6 Bxf6 10.Rxf6 e3 11.Qh6+ Kg8
12.Rg6+ Kf7 13.Rg7+ Ke8 14.Rxe7+ (9.391.470.506) 2652
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan

whereagles
Posts: 556
Joined: Thu Nov 13, 2014 11:03 am

Re: BT2630 position 15

Post by whereagles » Sat Dec 29, 2018 12:07 am

this is kasparov-karpov 1987 right?

Dann Corbit
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Contact:

Re: BT2630 position 15

Post by Dann Corbit » Sat Dec 29, 2018 12:20 am

whereagles wrote:
Sat Dec 29, 2018 12:07 am
this is kasparov-karpov 1987 right?
Right:

2b1q3/p7/1p1p2kb/nPpN3p/P1P1P2P/6P1/5R1K/5Q2 w - - bm e5; id "BT2630.15"; c0 "Kasparov-Karpov";
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.

whereagles
Posts: 556
Joined: Thu Nov 13, 2014 11:03 am

Re: BT2630 position 15

Post by whereagles » Sat Dec 29, 2018 9:31 am

that game was predecessor to engine games.. it featured a lot of high level shuffling :D

User avatar
Mike S.
Posts: 1480
Joined: Thu Mar 09, 2006 4:33 am

Re: BT2630 position 15

Post by Mike S. » Sat Dec 29, 2018 11:00 am

Stockfish 10 confirms that the choice between 1.Rf6+ and 1.e5 is very close:

i7 7700HQ 3.4 GHz
1024 GB Hashtables
3 threads (cores)
5-men Syzygy EGTBs


Analysis by Stockfish 10 64 BMI2 MultiPV(3):

1. +- (9.71): 1.Rf6+ Kg7 2.e5 dxe5 3.Qd3 e4 4.Qc3 Kh7 5.Rd6 Bg7 6.Nf6+ Kh8 7.Qc1 Qe7 8.Qg5 Bg4 9.Qg6 Bxf6 10.Rxf6 e3 11.Qh6+ Kg8 12.Rg6+ Kf7 13.Rg7+ Ke8 14.Qg6+ Kd8 15.Qd3+ Qd7 16.Rxd7+ Bxd7 17.Qxe3 Bg4 18.Qe4 Kd7 19.Qd5+ Ke7 20.Qe5+ Kd7 21.Qg7+ Kd6 22.Qf7 Be6 23.Qxh5 Nxc4 24.Qg5 Ne5 25.Qd8+ Nd7 26.h5 Bf5 27.h6 Bc2 28.Qg5 Ne5 29.Qg7 Ke6 30.h7 Nf7 31.Qg8 Ke7 32.Qxf7+ Kxf7 33.h8Q Ke7 34.Qc3

2. +- (9.68): 1.e5 dxe5 2.Rf6+ Kg7 3.Qd3 e4 4.Qc3 Kh7 5.Rd6 Bg7 6.Nf6+ Kh8 7.Qc1 Qe7 8.Qg5 Bg4 9.Qg6 Bxf6 10.Rxf6 e3 11.Qh6+ Kg8 12.Rg6+ Kf7 13.Rg7+ Ke8 14.Qg6+ Kd8 15.Qd3+ Qd7 16.Rxd7+ Bxd7 17.Qxe3 Bg4 18.Qe4 Kd7 19.Qd5+ Ke7 20.Qe5+ Kd7 21.Qg7+ Kd6 22.Qf7 Be6 23.Qxh5 Nxc4 24.Qg5 Ne5 25.Qd8+ Nd7 26.h5 Bf5 27.h6 Bd3 28.Qh8 Kc7 29.h7 c4 30.Qg8 Bxh7 31.Qxh7 c3 32.Kg2 Kc8 33.Qd3 c2 34.Qxc2+ Nc5

3. +- (1.66): 1.Rf3 Bg4 2.Rf6+ Kg7 3.Rxd6 Qe5 4.Rd8 Kg6 5.Ra8 Qb2+ 6.Kh1 Bg7 7.Rxa7 Bf6 8.Nf4+ Kh6 9.Ng2 Qa1 10.Qxa1 Bxa1 11.Ne3 Bf3+ 12.Kh2 Bd4 13.Nf5+ Kg6 14.Nxd4 cxd4 15.c5 Kf6 16.cxb6 d3 17.b7 Nxb7 18.Rxb7 Bg4 19.e5+ Kxe5 20.Re7+ Kf6 21.Re1 d2 22.Rf1+ Ke5 23.a5 d1Q 24.Rxd1 Bxd1 25.a6 Be2 26.a7 Bf3 27.b6 Kf5 28.Kg1 Bb7 29.Kf2 Ke6 30.Kf1
Regards, Mike

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Mike S.
Posts: 1480
Joined: Thu Mar 09, 2006 4:33 am

Re: BT2630 position 15

Post by Mike S. » Sun Dec 30, 2018 2:16 pm

Mike S. wrote:
Sat Dec 29, 2018 11:00 am
1. +- (9.71): 1.Rf6+ Kg7 2.e5 dxe5 3.Qd3 ...

2. +- (9.68): 1.e5 dxe5 2.Rf6+ Kg7 3.Qd3 ...

3. +- (1.66): 1.Rf3 ...
:roll: I had missed totally that it is just a transposition!
Regards, Mike

zullil
Posts: 5189
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Re: BT2630 position 15

Post by zullil » Sun Dec 30, 2018 2:57 pm

Mike S. wrote:
Sun Dec 30, 2018 2:16 pm
Mike S. wrote:
Sat Dec 29, 2018 11:00 am
1. +- (9.71): 1.Rf6+ Kg7 2.e5 dxe5 3.Qd3 ...

2. +- (9.68): 1.e5 dxe5 2.Rf6+ Kg7 3.Qd3 ...

3. +- (1.66): 1.Rf3 ...
:roll: I had missed totally that it is just a transposition!
See also Eelco's post above. :wink:

Spliffjiffer
Posts: 166
Joined: Thu Aug 02, 2012 5:48 pm
Location: Germany

Re: BT2630 position 15

Post by Spliffjiffer » Sun Dec 30, 2018 3:36 pm

the good old BTx-testsuites...still good for testing Leela imo :-)...not the only questionable testposition in this suite...an other one (beyond others) is No.4:
[d]5r1k/1P4pp/3P1p2/4p3/1P5P/3q2P1/Q2b2K1/B3R3 w - - 0 1
bm Qf7
...well thats probably correct but is it winning ?
i analysed this position long time ago and came to the conclusion that its just a draw !?
has this been discussed already somewhere ?
Wahrheiten sind Illusionen von denen wir aber vergessen haben dass sie welche sind.

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