Complex Puzzle

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Nordlandia
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Complex Puzzle

Post by Nordlandia »

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abcdefgh

Br6/P1P1PPP1/1bP1p1bk/3pp3/1p4n1/1N1pP2p/1R1P4/B6K w - - 0 0

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Nordlandia
Posts: 2822
Joined: Fri Sep 25, 2015 9:38 pm
Location: Sortland, Norway

Re: Complex Puzzle

Post by Nordlandia »

How long does it take before your engine of choise detects 1. Re2?

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abcdefgh

3n1N2/1p3nK1/p1k5/1prN1p2/p4Bp1/1P4Qp/1PR2P2/1b2q1b1 w - - 0 1
Another:
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abcdefgh

r1bk4/P2p1p1p/1KPP1P2/6P1/8/4B3/6P1/8 w - - 0 0
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Vinvin
Posts: 5287
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Complex Puzzle

Post by Vinvin »

Nordlandia wrote:How long does it take before your engine of choise detects 1. Re2?

[d]3n1N2/1p3nK1/p1k5/1prN1p2/p4Bp1/1P4Qp/1PR2P2/1b2q1b1 w - - 0 1
2 run with the latest SF (6*4.0 GHz) : 53 sec and 2m53s

Code: Select all

Stockfish_16033114_x64_modern:
...
 28/32	00:08	 83 186k	10 300k	 0,00	1.Be3 b6 2.Rxc5+ bxc5 3.Ne7+ Kb7 4.Nd7 Bh2 5.Qxh2 f4 6.Nxc5+ Ka8 7.Qxf4 Qd1 8.Qc7 Qd6 9.Qc8+ Qb8 10.Qxa6+ Qa7 11.Qc8+ Qb8 12.Qa6+
 29/32	00:13	 138 264k	10 320k	 0,00	1.Be3 b6 2.Rxc5+ bxc5 3.Ne7+ Kb7 4.Nd7 Bh2 5.Qxh2 f4 6.Nxc5+ Ka8 7.Qxf4 Qd1 8.Qc7 Qd6 9.Qc8+ Qb8 10.Qxa6+ Qa7 11.Qc8+ Qb8 12.Qa6+
 30/32	00:22	 228 368k	10 136k	 0,00	1.Be3 b6 2.Rxc5+ bxc5 3.Ne7+ Kb7 4.Nd7 Bh2 5.Qxh2 f4 6.Nxc5+ Ka8 7.Qxf4 Qd1 8.Qc7 Qd6 9.Qc8+ Qb8 10.Qxa6+ Qa7 11.Qc8+ Qb8 12.Qa6+
 31/32	00:34	 355 392k	10 249k	 0,00	1.Be3 b6 2.Rxc5+ bxc5 3.Ne7+ Kb7 4.Nd7 Bh2 5.Qxh2 f4 6.Nxc5+ Ka8 7.Qxf4 Qd1 8.Qc7 Qd6 9.Qc8+ Qb8 10.Qxa6+ Qa7 11.Qc8+ Qb8 12.Qa6+
 32/32+	00:53	 558 039k	10 356k	+0,06	1.Re2
 32/32+	00:55	 570 830k	10 367k	+0,13	1.Re2
 32/54+	03:22	 2 127 158k	10 493k	+6,84	1.Re2

Code: Select all

Stockfish_16033114_x64_modern:
 27/53	00:07	 81 152k	11 062k	 0,00	1.Be3 b6 2.Rxc5+ bxc5 3.Ne7+ Kb7 4.Nd7 Bh2 5.Qxh2 f4 6.Nxc5+ Ka8 7.Qxf4 Qd1 8.Qc7 Qd6 9.Qc8+ Qb8 10.Qxa6+ Qa7 11.Qc8+ Qb8 12.Qa6+
 28/53	00:11	 124 282k	11 082k	 0,00	1.Be3 b6 2.Rxc5+ bxc5 3.Ne7+ Kb7 4.Nd7 Bh2 5.Qxh2 f4 6.Nxc5+ Ka8 7.Qxf4 Qd1 8.Qc7 Qd6 9.Qc8+ Qb8 10.Qxa6+ Qa7 11.Qc8+ Qb8 12.Qa6+
 29/53	00:15	 175 567k	11 120k	 0,00	1.Be3 b6 2.Rxc5+ bxc5 3.Ne7+ Kb7 4.Nd7 Bh2 5.Qxh2 f4 6.Nxc5+ Ka8 7.Qxf4 Qd1 8.Qc7 Qd6 9.Qc8+ Qb8 10.Qxa6+ Qa7 11.Qc8+ Qb8 12.Qa6+
 30/53	00:18	 202 265k	11 112k	 0,00	1.Be3 b6 2.Rxc5+ bxc5 3.Ne7+ Kb7 4.Nd7 Bh2 5.Qxh2 f4 6.Nxc5+ Ka8 7.Qxf4 Qd1 8.Qc7 Qd6 9.Qc8+ Qb8 10.Qxa6+ Qa7 11.Qc8+ Qb8 12.Qa6+
 31/53	00:28	 315 362k	11 080k	 0,00	1.Be3 b6 2.Rxc5+ bxc5 3.Ne7+ Kb7 4.Nd7 Bh2 5.Qxh2 f4 6.Nxc5+ Ka8 7.Qxf4 Qd1 8.Qc7 Qd6 9.Qc8+ Qb8 10.Qxa6+ Qa7 11.Qc8+ Qb8 12.Qa6+
 32/53	00:43	 486 974k	11 087k	 0,00	1.Be3 b6 2.Rxc5+ bxc5 3.Ne7+ Kb7 4.Nd7 Bh2 5.Qxh2 f4 6.Nxc5+ Ka8 7.Qxf4 Qd1 8.Qc7 Qd6 9.Qc8+ Qb8 10.Qxa6+ Qa7 11.Qc8+ Qb8 12.Qa6+
 33/53	01:04	 712 781k	11 114k	 0,00	1.Be3 b6 2.Rxc5+ bxc5 3.Ne7+ Kb7 4.Nd7 Bh2 5.Qxh2 f4 6.Nxc5+ Ka8 7.Qxf4 Qd1 8.Qc7 Qd6 9.Qc8+ Qb8 10.Qxa6+ Qa7 11.Qc8+ Qb8 12.Qa6+
 34/53	01:27	 960 276k	10 990k	 0,00	1.Be3 b6 2.Rxc5+ bxc5 3.Ne7+ Kb7 4.Nd7 Bh2 5.Qxh2 f4 6.Nxc5+ Ka8 7.Qxf4 Qd1 8.Qc7 Qd6 9.Qc8+ Qb8 10.Qxa6+ Qa7 11.Qc8+ Qb8 12.Qa6+
 35/53+	02:14	 1 476 762k	10 964k	+0,06	1.Re2
 35/53+	02:17	 1 509 284k	10 967k	+0,13	1.Re2
 35/53+	06:42	 4 411 749k	10 956k	+6,84	1.Re2
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Vinvin
Posts: 5287
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Complex Puzzle

Post by Vinvin »

Nordlandia wrote:...
Another:
[d]r1bk4/P2p1p1p/1KPP1P2/6P1/8/4B3/6P1/8 w - - 0 0
2 run with Sting SF 6.7 (6 GHz) : 4 sec and 10 sec

Code: Select all

Sting-sf-67:
...
1.c7+ Ke8 2.Bd4 Kf8 3.Bc5 Ke8 4.Be3 Kf8 5.Bd4 Ke8 6.Bf2 Kf8 7.Bg3 Ke8 8.Bh4 Kf8 9.Be1 Ke8 10.Bc3 Kf8 11.Bd2 Ke8 12.Be1 Kf8 13.Bf2 Ke8 14.Be3
 28	00:02	 2 803k	1 174k	+3,51	1.c7+ Ke8 2.Bd4 Kf8 3.Bc5 Ke8 4.Be3 Kf8 5.Bd4 Ke8 6.Bf2 Kf8 7.Bg3 Ke8 8.Bh4 Kf8 9.Be1 Ke8 10.Bc3 Kf8 11.Bd2 Ke8 12.Be1 Kf8 13.Bf2 Ke8 14.Be3
 29	00:02	 3 469k	1 407k	+3,51	1.c7+ Ke8 2.Bd4 Kf8 3.Bc5 Ke8 4.Be3 Kf8 5.Bd4 Ke8 6.Bf2 Kf8 7.Bg3 Ke8 8.Bh4 Kf8 9.Be1 Ke8 10.Bc3 Kf8 11.Bd2 Ke8 12.Be1 Kf8 13.Bf2 Ke8 14.Be3
 30	00:02	 4 430k	1 655k	+3,51	1.c7+ Ke8 2.Bd4 Kf8 3.Bc5 Ke8 4.Be3 Kf8 5.Bd4 Ke8 6.Bf2 Kf8 7.Bg3 Ke8 8.Bh4 Kf8 9.Be1 Ke8 10.Bc3 Kf8 11.Bd2 Ke8 12.Be1 Kf8 13.Bf2 Ke8 14.Be3
 31	00:02	 5 343k	1 925k	+3,51	1.c7+ Ke8 2.Bd4 Kf8 3.Bc5 Ke8 4.Be3 Kf8 5.Bd4 Ke8 6.Bf2 Kf8 7.Bg3 Ke8 8.Bh4 Kf8 9.Be1 Ke8 10.Bc3 Kf8 11.Bd2 Ke8 12.Be1 Kf8 13.Bf2 Ke8 14.Be3
 32	00:02	 7 159k	2 419k	+3,51	1.c7+ Ke8 2.Bd4 Kf8 3.Bc5 Ke8 4.Be3 Kf8 5.Bd4 Ke8 6.Bf2 Kf8 7.Bg3 Ke8 8.Bh4 Kf8 9.Be1 Ke8 10.Bc3 Kf8 11.Bd2 Ke8 12.Be1 Kf8 13.Bf2 Ke8 14.Be3
 33	00:03	 8 926k	2 858k	+3,51	1.c7+ Ke8 2.Bd4 Kf8 3.Bc5 Ke8 4.Be3 Kf8 5.Bd4 Ke8 6.Bf2 Kf8 7.Bg3 Ke8 8.Bh4 Kf8 9.Be1 Ke8 10.Bc3 Kf8 11.Bd2 Ke8 12.Be1 Kf8 13.Bf2 Ke8 14.Be3
 34	00:03	 12 040k	3 536k	+3,51	1.c7+ Ke8 2.Bd4 Kf8 3.Bc5 Ke8 4.Be3 Kf8 5.Bd4 Ke8 6.Bf2 Kf8 7.Bg3 Ke8 8.Bh4 Kf8 9.Be1 Ke8 10.Bc3 Kf8 11.Bd2 Ke8 12.Be1 Kf8 13.Bf2 Ke8 14.Be3
 35	00:03	 15 568k	4 175k	+3,51	1.c7+ Ke8 2.Bd4 Kf8 3.Bc5 Ke8 4.Be3 Kf8 5.Bd4 Ke8 6.Bf2 Kf8 7.Bg3 Ke8 8.Bh4 Kf8 9.Be1 Ke8 10.Bc3 Kf8 11.Bd2 Ke8 12.Be1 Kf8 13.Bf2 Ke8 14.Bc5 Kf8 15.Bg1 Ke8 16.Bh2 Kf8 17.Bf4 Ke8 18.Bg3 Kf8 19.Be5 Ke8 20.Bg3
 36	00:04	 22 011k	5 126k	+3,47	1.c7+ Ke8 2.Bd4 Kf8 3.Bc5 Ke8 4.Be3 Kf8 5.Bd4 Ke8 6.Bf2 Kf8 7.Bg3 Ke8 8.Bh4 Kf8 9.Be1 Ke8 10.Bc3 Kf8 11.Bd2 Ke8 12.Be1 Kf8 13.Bd2
 37+	00:04	 28 403k	5 804k	+3,55	1.g6
 37+	00:04	 28 537k	5 812k	+3,63	1.g6
 37+	00:12	 122 300k	9 458k	+108,40	1.g6
 37	00:12	 122 300k	9 458k	+108,40	1.g6 hxg6 2.c7+ Ke8 3.Bh6 g5 4.g4 Bb7 5.c8R+ Bxc8 6.Bg7 Kd8 7.Bf8 Ke8 8.Bh6 Kd8 9.Bxg5 Ke8 10.Bh6 Kd8 11.g5 Ke8 12.Bg7 Kd8 13.Bf8 Ke8 14.Bh6 Kd8 15.g6

Code: Select all

Sting-sf-67:
...
 30	00:02	 5 545k	2 082k	+3,43	1.c7+ Ke8 2.Bd4 Kf8 3.Bf2 Ke8 4.Be1 Kf8 5.Bg3 Ke8 6.Bf2 Kf8 7.Bc5 Ke8 8.Be3 Kf8 9.Bd2 Kg8 10.Bf4 Kh8 11.Be5 Kg8 12.Bg3 Kf8 13.Bf4 Kg8 14.Bd2 Kf8 15.Bc3 Ke8 16.Bd4
 31+	00:02	 5 738k	2 138k	+3,51	1.c7+
 31	00:02	 6 504k	2 362k	+3,55	1.c7+ Ke8 2.Bd4 Kf8 3.Bf2 Ke8 4.Be1 Kf8 5.Bg3 Ke8 6.Bf2 Kf8 7.Bc5 Ke8 8.Be3 Kf8 9.Bd4 Kg8 10.Be3 Kh8 11.g3 Kg8 12.Bc5 Kf8 13.Be3 Ke8 14.Bc5 Kf8
 32-	00:02	 8 461k	2 879k	+3,43	1.c7+
 32	00:03	 9 368k	3 103k	+3,59	1.c7+ Ke8 2.Bd4 Kf8 3.Bf2 Ke8 4.Be1 Kf8 5.Bg3 Ke8 6.Bf2 Kf8 7.Bc5 Kg8 8.Bg1 Kf8 9.Bh2 Ke8 10.Bf4 Kf8 11.Bd2 Ke8 12.Bc3 Kf8 13.Be1 Ke8 14.Ba5 Kf8 15.Bc3 Ke8 16.Bd2 Kf8 17.Bb4 Ke8 18.Bc3
 33	00:03	 11 629k	3 596k	+3,59	1.c7+ Ke8 2.Bd4 Kf8 3.Bf2 Ke8 4.Be1 Kf8 5.Bg3 Ke8 6.Bf2 Kf8 7.Bc5 Kg8 8.Bg1 Kf8 9.Bh2 Ke8 10.Bf4 Kf8 11.Bd2 Ke8 12.Bc3 Kf8 13.Be1 Ke8 14.Bf2
 34	00:03	 14 792k	4 232k	+3,59	1.c7+ Ke8 2.Bd4 Kf8 3.Bf2 Ke8 4.Be1 Kf8 5.Bg3 Ke8 6.Bf2 Kf8 7.Bc5 Kg8 8.Bg1 Kf8 9.Bh2 Ke8 10.Bf4 Kf8 11.Bd2 Ke8 12.Bc3 Kf8 13.Be1 Ke8 14.Bd2 Kf8 15.Bb4 Ke8 16.Bc3
 35	00:03	 16 934k	4 608k	+3,59	1.c7+ Ke8 2.Bd4 Kf8 3.Bf2 Ke8 4.Be1 Kf8 5.Bg3 Ke8 6.Bf2 Kf8 7.Bc5 Kg8 8.Bg1 Kf8 9.Bh2 Ke8 10.Bf4 Kf8 11.Bd2 Ke8 12.Bc3 Kf8 13.Be1 Ke8 14.Bd2 Kf8 15.Bb4 Ke8 16.Bc3
 36	00:03	 20 617k	5 187k	+3,59	1.c7+ Ke8 2.Bd4 Kf8 3.Bf2 Ke8 4.Be1 Kf8 5.Bg3 Ke8 6.Bf2 Kf8 7.Bc5 Kg8 8.Bg1 Kf8 9.Bh2 Ke8 10.Bf4 Kf8 11.Bd2 Ke8 12.Bc3 Kf8 13.Be1 Ke8 14.Bg3 Kf8 15.Bh2
 37	00:04	 33 391k	6 851k	+3,59	1.c7+ Ke8 2.Bd4 Kf8 3.Bf2 Ke8 4.Be1 Kf8 5.Bg3 Ke8 6.Bf2 Kf8 7.Bc5 Kg8 8.Bg1 Kf8 9.Bh2 Ke8 10.Bf4 Kf8 11.Bd2 Ke8 12.Bc3 Kf8 13.Bd4 Ke8 14.Be5 Kf8 15.Bh2
 38	00:05	 42 197k	7 617k	+3,59	1.c7+ Ke8 2.Bd4 Kf8 3.Bf2 Ke8 4.Be1 Kf8 5.Bg3 Ke8 6.Bf2 Kf8 7.Bc5 Kg8 8.Bg1 Kf8 9.Bh2 Ke8 10.Bf4 Kf8 11.Bd2 Ke8 12.Bc3 Kf8 13.Bd4 Ke8 14.Bc3
 39	00:06	 51 281k	8 258k	+3,59	1.c7+ Ke8 2.Bd4 Kf8 3.Bf2 Ke8 4.Be1 Kf8 5.Bg3 Ke8 6.Bf2 Kf8 7.Bc5 Kg8 8.Bg1 Kf8 9.Bh2 Ke8 10.Bf4 Kf8 11.Bh2
 40	00:08	 80 710k	9 272k	+3,59	1.c7+ Ke8 2.Bd4 Kf8 3.Bf2 Ke8 4.Be1 Kf8 5.Bg3 Ke8 6.Bf2 Kf8 7.Bc5 Kg8 8.Bg1 Kf8 9.Bh2 Ke8 10.Bf4 Kf8 11.Bd2 Ke8 12.Bc3 Kf8 13.Be5 Ke8 14.Bg3 Kf8 15.Bf4 Ke8 16.Be3 Kf8 17.Bd4 Ke8 18.Bc5 Kf8 19.Bb4 Kg8 20.Ba3 Kf8 21.Bc5
 41	00:09	 94 467k	9 772k	+3,59	1.c7+ Ke8 2.Bd4 Kf8 3.Bf2 Ke8 4.Be1 Kf8 5.Bg3 Ke8 6.Bf2 Kf8 7.Bc5 Kg8 8.Bg1 Kf8 9.Bh2 Ke8 10.Bf4 Kf8 11.Bd2 Ke8 12.Bc3 Kf8 13.Be5 Ke8 14.Bg3 Kf8 15.Bf4 Ke8 16.Bd2 Kf8 17.Bc1 Ke8 18.Be3 Kf8 19.Bd2
 42+	00:10	 100 276k	9 870k	+3,67	1.g6
 42+	00:10	 100 813k	9 871k	+3,75	1.g6
 42+	00:21	 242 364k	11 453k	+108,55	1.g6
 42	00:21	 242 364k	11 453k	+108,55	1.g6 hxg6 2.c7+ Ke8 3.Bh6 g5 4.g4 Bb7 5.c8R+ Bxc8 6.Bg7 Kd8 7.Bf8 Ke8 8.Bh6 Kd8 9.Bxg5 Ke8 10.Bh6 Kd8 11.g5 Ke8 12.Bg7 Kd8 13.Bf8 Ke8 14.Bh6 Kd8 15.g6 fxg6 16.f7
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kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Re: Complex Puzzle

Post by kgburcham »

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abcdefgh

3n1N2/1p3nK1/p1k5/1prN1p2/p4Bp1/1P4Qp/1PR2P2/1b2q1b1 w - -

8 processor(s) found, POPCNT available
NUMA configuration with 1 node(s), offset 0
Nalimov 6 men EGTB available - 999 MB cache
Engine: Houdini 4 Pro x64 (4096 MB)
by Robert Houdart
other best move - reduce depth to 10
14/59 0:01 +1.61 1.Re2 Bxf2 2.Ne7+ Kb6 3.Nd7+ Ka5 4.Rxf2 b4 5.Bc7+ Kb5 6.bxa4+ Kxa4 7.Nxc5+ Kb5 8.Nxf5 Bxf5 9.Rxf5 Qxg3 10.Bxg3 Kc4 11.Nxb7 Kb3 12.Nxd8 Nxd8 13.Rf2 a5 14.Kf6 (20.760.239) 18226
15/59 0:01 +1.72++ 1.Re2 (23.491.285) 18281
15/59 0:01 +1.50-- 1.Re2 Bxf2 (23.822.607) 18310
15/59 0:04 +1.94++ 1.Re2 (92.351.788) 21899 TB:7
15/59 0:04 +1.86 1.Re2 Bxf2 2.Ne7+ Kb6 3.Nd7+ Ka5 4.Rxf2 b4 5.Bc7+ Kb5 6.bxa4+ Kxa4 7.Nxc5+ Kb5 8.Nxf5 Bxf5 9.Rxf5 Qxg3 10.Bxg3 Kc4 11.Nxb7 Kb3 12.Nxd8 Nxd8 13.Rd5 Nb7 14.Rd4 (92.670.776) 21861 TB:7
16/64 0:04 +1.75-- 1.Re2 Bxf2 (102.633.519) 21916 TB:7
16/64 0:05 +1.53-- 1.Re2 Bxf2 (121.282.335) 21991 TB:7
16/70 0:06 +1.97++ 1.Re2 (135.246.109) 22001 TB:11
16/70 0:06 +1.94 1.Re2 Bxf2 2.Ne7+ Kb6 3.Nd7+ Ka5 4.Rxf2 b4 5.Bc7+ Kb5 6.bxa4+ Kxa4 7.Nxc5+ Kb5 8.Nxf5 Bxf5 9.Rxf5 Qxg3 10.Bxg3 Kc4 11.Nxb7 Kb3 12.Nxd8 Nxd8 13.Rd5 Nb7 14.Be5 (135.904.847) 21973 TB:11
17/70 0:07 +2.05++ 1.Re2 (154.809.610) 22043 TB:11
17/70 0:07 +1.96 1.Re2 Bxf2 2.Ne7+ Kb6 3.Nd7+ Ka5 4.Rxf2 b4 5.Bc7+ Kb5 6.bxa4+ Kxa4 7.Nxc5+ Kb5 8.Nxf5 Bxf5 9.Rxf5 Qxg3 10.Bxg3 Kc4 11.Nxb7 Kb3 12.Nxd8 Nxd8 13.Rd5 Nb7 14.Be5 (156.880.379) 22046 TB:11
18/70 0:09 +1.85-- 1.Re2 Bxf2 (202.191.357) 22312 TB:12
18/70 0:11 +1.63-- 1.Re2 Bxf2 (273.971.388) 22863 TB:16
18/70 0:14 +1.61 1.Re2 Bxf2 2.Ne7+ Kb6 3.Nd7+ Ka5 4.Rxf2 b4 5.Bc7+ Kb5 6.bxa4+ Kxa4 7.Nxc5+ Kb5 8.Nxf5 Bxf5 9.Rxf5 Qxg3 10.Bxg3 Kc4 11.Nd7 Kb3 12.Rf2 Ng5 13.Nf6 Nge6+ 14.Kg6 (324.359.806) 22935 TB:16


Engine: Sting SF 6.7 64bit (8192 MB)
by Tord Romstad, Marco Costalba, Joona Kii

22.29 0:08 +0.08++ 1.Re2 (77.157.550) 8695
22.01 0:09 +0.16++ 1.Re2 (80.299.059) 8803
22.01 0:09 +0.28++ 1.Re2 (82.885.691) 8905
22.01 0:09 +0.46++ 1.Re2 (87.097.713) 9068
22.01 0:09 +0.73++ 1.Re2 (92.115.799) 9231
22.01 0:10 +1.14++ 1.Re2 (100.786.457) 9493
22.01 0:11 +1.75++ 1.Re2 (113.975.868) 9878
22.01 0:14 +2.67++ 1.Re2 (156.000.676) 10763

Engine: Komodo 9.42 64-bit (8192 MB)
by Don Dailey, Larry Kaufman, Mark Lefler
Threads now set to 8

33.24 0:34 +0.07++ 1.Re2 Rxd5 2.Rxe1 (717.670.758) 20559
33.01 0:37 +0.14++ 1.Re2 Rxd5 2.Rxe1 (773.031.757) 20495
33.01 0:40 +0.24++ 1.Re2 Rxd5 2.Rxe1 (820.785.153) 20407
33.01 0:44 +0.39++ 1.Re2 Rxd5 2.Rxe1 (905.448.659) 20276
33.01 0:49 +0.61++ 1.Re2 Rxd5 2.Rxe1 (994.309.636) 20157
33.01 0:56 +0.94++ 1.Re2 Rxd5 2.Rxe1 (1.118.814.472) 19961
33.01 1:12 +1.43++ 1.Re2 Rxd5 (1.441.435.445) 19765
no chess program was born totally from one mind. all chess programs have many ideas from many minds.
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Nordlandia
Posts: 2822
Joined: Fri Sep 25, 2015 9:38 pm
Location: Sortland, Norway

Re: Complex Puzzle

Post by Nordlandia »

Simkhovich, Froim Markovich
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abcdefgh

N3kb2/pq4p1/4B1P1/1p1P2B1/p7/3P4/2P5/2K5 w - - 0 1

1. Bf7+
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Nordlandia
Posts: 2822
Joined: Fri Sep 25, 2015 9:38 pm
Location: Sortland, Norway

Re: Complex Puzzle

Post by Nordlandia »

Mikhail Mgebrishvili (Georgia)
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abcdefgh

5Bk1/p1p1p1Pr/4p1Kp/8/p5P1/P1p2pP1/2P2P2/7N w - - 4 1

Win 9/10
This is a version of a 1979 study by the same composer, with a solution in 164 moves. Here the composer claims the longest solution ever to a study - 222 moves. While bK oscillates between g8 and f7 wK repeatedly loses a move by marching to the al corner, there to triangulate and return to g6, every time forcing Bl to use up one of his stock of (playable) P-moves. If the composer's arithmetic is to be trusted, we reach 221...H5 222.gh5 wins, since 222...Rxg7+ 223.Bxg7 is not stalemate, e3 224.fe e4. Observing that after aP and cP moves are exhausted, then when wK returns to h5, then Bl makes his P-move one move earlier (avoiding Kg8?), the alleged arithmetic becomes:
5 x 23 = 115 to exhaust a- and c-pawns.
1 x 22 = Kg6 back to h5 prior to e6-e5
3x21 = to exhaust eP moves
1 x 22 = Kh5 back to g6,
222.Kg6, and 223.gxh5. (Thanks to
David Blundell!)
However, the study is unsound in its
present form. When wK is at a2, for
example, and bK on g8 (not vulnerable to
a g5-g6+!), it is possible for Bl to play
h5;g5,h4;g4,h3; followed by Rh4xg4 etc.
DB confirms this (though with wKc 1),
analysing:
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Nordlandia
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Location: Sortland, Norway

Re: Complex Puzzle

Post by Nordlandia »

3rd Hon. Mention | M.Zinar
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abcdefgh

8/1pP3p1/1p1k2P1/1p6/pP5p/P2P2pP/1p4P1/3K4 w - - 0 1

1. c8N+
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Nordlandia
Posts: 2822
Joined: Fri Sep 25, 2015 9:38 pm
Location: Sortland, Norway

Re: Complex Puzzle

Post by Nordlandia »



This is the intended solution, although the study is unsound.
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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Complex Puzzle

Post by zullil »

Nordlandia wrote:Simkhovich, Froim Markovich
8 
7 
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1 
abcdefgh

N3kb2/pq4p1/4B1P1/1p1P2B1/p7/3P4/2P5/2K5 w - - 0 1

1. Bf7+
Stockfish finds this, though not easily:

Code: Select all

info depth 43 seldepth 86 multipv 1 score cp -490 lowerbound nodes 394438874730 nps 50402132 hashfull 999 tbhits 0 time 7825837 pv e6f7
info depth 43 currmove e6f7 currmovenumber 1
info depth 43 seldepth 86 multipv 1 score cp -392 lowerbound nodes 394439954879 nps 50402148 hashfull 999 tbhits 0 time 7825856 pv e6f7
info depth 43 currmove e6f7 currmovenumber 1
info depth 43 seldepth 86 multipv 1 score cp -268 lowerbound nodes 394441294122 nps 50402158 hashfull 999 tbhits 0 time 7825881 pv e6f7
info depth 43 currmove e6f7 currmovenumber 1
info depth 43 seldepth 90 multipv 1 score cp -111 lowerbound nodes 399328131239 nps 50467136 hashfull 999 tbhits 0 time 7912637 pv e6f7
info depth 43 currmove e6f7 currmovenumber 1
info depth 43 currmove a8c7 currmovenumber 2
info depth 43 currmove a8b6 currmovenumber 3
info depth 43 currmove g5f4 currmovenumber 4
info depth 43 currmove c2c4 currmovenumber 5
info depth 43 currmove g5e3 currmovenumber 6
info depth 43 currmove c1b2 currmovenumber 7
info depth 43 currmove d3d4 currmovenumber 8
info depth 43 currmove d5d6 currmovenumber 9
info depth 43 currmove c1b1 currmovenumber 10
info depth 43 currmove g5h4 currmovenumber 11
info depth 43 currmove g5d8 currmovenumber 12
info depth 43 currmove g5d2 currmovenumber 13
info depth 43 currmove c1d2 currmovenumber 14
info depth 43 currmove c1d1 currmovenumber 15
info depth 43 currmove g5e7 currmovenumber 16
info depth 43 currmove e6c8 currmovenumber 17
info depth 43 currmove e6h3 currmovenumber 18
info depth 43 currmove g5h6 currmovenumber 19
info depth 43 currmove c2c3 currmovenumber 20
info depth 43 currmove e6d7 currmovenumber 21
info depth 43 currmove g5f6 currmovenumber 22
info depth 43 currmove e6f5 currmovenumber 23
info depth 43 currmove e6g8 currmovenumber 24
info depth 43 currmove e6g4 currmovenumber 25
info depth 43 seldepth 90 multipv 1 score cp -106 nodes 402611167516 nps 50504233 hashfull 999 tbhits 0 time 7971830 pv e6f7 e8d7 f7e6 d7d6 g5f4 d6c5 f4e3 c5b4 e3d2 b4a3 c1b1 b7a8 b1a1 a7a6 a1b1 a6a5 b1a1 a8d8 d2c1 a3b4 c1d2 b4c5 d2e3 c5d6 e3f4 d6e7 f4g5 e7e8 g5d8 e8d8 a1a2 b5b4 a2b2 f8d6 e6g4 d6e5 b2a2 d8c7 g4e6 c7d6 e6f7 d6d7 f7e6 d7e7 e6f7 e5d6 f7e6 d6c5 a2b2 e7d6 b2b1 d6c7 e6f7 c7d8 f7e6 c5d6 b1b2 d8c7 b2a2 d6g3 e6f7 c7d8 a2b1 g3d6 c2c4 d6c5 b1b2 c5d4 b2b1 d8d7 b1c2 d7d6
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