Study by Peter Krug

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Paloma
Posts: 1163
Joined: Thu Dec 25, 2008 9:07 pm

Study by Peter Krug

Post by Paloma »

[fen]8/5p2/1p1r2p1/1p1p1R2/1P3KN1/8/7p/3N2kr w - - 0 1[/fen]
1.Re5 Re6 2.Rxe6 and now Peter continues with 2...fxe6 3.Ng3+ d4 4.Kg3 e5 6.Ke2 which is a mate in 12

better is 2...Kf1 and now 3.Re8 f5 4.Nde3+ Ke2 5.Nxh2 mate in 32
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peter
Posts: 3167
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Study by Peter Krug

Post by peter »

Paloma wrote: ↑Thu Jul 14, 2022 12:14 am [fen]8/5p2/1p1r2p1/1p1p1R2/1P3KN1/8/7p/3N2kr w - - 0 1[/fen]
1.Re5 Re6 2.Rxe6 and now Peter continues with 2...fxe6 3.Ng3+ d4 4.Kg3 e5 6.Ke2 which is a mate in 12

better is 2...Kf1 and now 3.Re8 f5 4.Nde3+ Ke2 5.Nxh2 mate in 32
As for your line after 2...fxe6 there's a typo, probably that should read 3.Nge3 there instead of Ng3, which isn't possible, but as for the rest you're right (probably more or less, didn't check exact DTM).
Guess Peter just didn't give the longer DTM because it's a clear win too, the re-capture is the thematic try of Black and it isn't a mate in x- problem, so DTM doesn't matter so much.

Nice study, thanks for showing
regards
Peter.
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Ignacio
Posts: 177
Joined: Wed Mar 08, 2006 8:15 pm

Re: Study by Peter Krug

Post by Ignacio »

Paloma wrote: ↑Thu Jul 14, 2022 12:14 am [fen]8/5p2/1p1r2p1/1p1p1R2/1P3KN1/8/7p/3N2kr w - - 0 1[/fen]
1.Re5 Re6 2.Rxe6 and now Peter continues with 2...fxe6 3.Ng3+ d4 4.Kg3 e5 6.Ke2 which is a mate in 12

better is 2...Kf1 and now 3.Re8 f5 4.Nde3+ Ke2 5.Nxh2 mate in 32
And what about 1... Kf1 or 1... d4?
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peter
Posts: 3167
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Study by Peter Krug

Post by peter »

Ignacio wrote: ↑Thu Jul 14, 2022 3:22 pm
Paloma wrote: ↑Thu Jul 14, 2022 12:14 am [fen]8/5p2/1p1r2p1/1p1p1R2/1P3KN1/8/7p/3N2kr w - - 0 1[/fen]
1.Re5 Re6 2.Rxe6 and now Peter continues with 2...fxe6 3.Ng3+ d4 4.Kg3 e5 6.Ke2 which is a mate in 12

better is 2...Kf1 and now 3.Re8 f5 4.Nde3+ Ke2 5.Nxh2 mate in 32
And what about 1... Kf1 or 1... d4?
1...d4 e.g.:

8/5p2/1p1r2p1/1p2R3/1P1p1KN1/8/7p/3N2kr w - - 0 1

Analysis by Stockfish 11 64 POPCNT30:

2.Re1+ Kg2 3.Re2+ Kf1 4.Kf3 Re6 5.Rb2 Ke1 6.Ndf2 Rf1 7.Rb1+ Kd2 8.Rxf1 Kc2 9.Nxh2 d3 10.Nhg4 Re8 11.Ne3+ Kc3 12.Rc1+ Kd4 13.Ned1 Re5 14.Rc3 Rf5+ 15.Kg3 Rg5+ 16.Kh4 Rh5+ 17.Kg4 d2 18.Rd3+ Kc4 19.Ne3+ Kxb4 20.Rxd2 Ka4 21.Rd4+ Ka3 22.Rd7 b4 23.Rxf7 b3 24.Nd3 b2 25.Nc4+ Kb3 26.Ncxb2 b5
+- (7.29) Depth: 37/72 00:00:49 2996MN, tb=16421821

1...Kf1 e.g.:

8/5p2/1p1r2p1/1p1pR3/1P3KN1/8/7p/3N1k1r w - - 0 1

Analysis by Stockfish 11 64 POPCNT30:

2.Kf3 d4 3.Re2 Re6 4.Rb2 Ke1 5.Ndf2 Rf1 6.Rb1+ Kd2 7.Rxf1 Kc3 8.Nxh2 Kxb4 9.Kf4 Kc5 10.Nf3 Rf6+ 11.Kg4 Re6 12.Rd1 Re8 13.Rxd4 Kc6 14.Kg3 Kc7 15.Rb4 f6 16.Rxb5 Re3 17.Rb1 Re6 18.Rb4 Rc6 19.Ne4 b5 20.Rxb5 Ra6 21.Rb4 f5 22.Nc5 Rc6 23.Nd3
+- (7.38) Depth: 32/59 00:00:08 473MN, tb=1458078
Peter.
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Vinvin
Posts: 5222
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Study by Peter Krug

Post by Vinvin »

Quick test : SugaR AI ICCF 2.50 and ShashChess22 are able to find the solution (AMD 5950x@4GHz)

Code: Select all

FEN: 8/5p2/1p1r2p1/1p1p1R2/1P3KN1/8/7p/3N2kr w - - 0 1

SugaR AI ICCF 2.50 avx2:
...
Found 513 tablebases
NNUE evaluation using nn-13406b1dcbe0.nnue enabled
 1/2	00:00	 944	472k	-1,34	1.Rxf7 Re6
 2/2	00:00	 2k	901k	-1,24	1.Rxf7 Re6
 3/3	00:00	 4k	1.989k	-0,75	1.Rxf7 g5+ 2.Ke5
 4/4	00:00	 7k	3.292k	-0,31	1.Rxf7 g5+ 2.Ke5 Rg6
 5/5	00:00	 24k	8.152k	-0,29	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kxd1
 6/6	00:00	 30k	9.865k	-0,32	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kxd1
 7/7	00:00	 65k	16.229k	-0,53	1.Rxf7 d4 2.Ndf2 Kg2 3.Nxh1 d3 4.Ke3
 8/9	00:00	 105k	20.986k	+0,63	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2
 9/18	00:00	 197k	17.926k	+0,80	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Nb2 Kd2 4.Kxd6 Kc3 5.Rf2 Rb1 6.Nxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5
 10/13	00:00	 216k	17.998k	+0,97	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Nb2 Kd2 4.Kxd6 Kc3 5.Rf2 Rb1 6.Nxh2 Rxb2 7.Rxb2 Kxb2
 11/22	00:00	 905k	19.670k	+0,50	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rg1 6.Ne5+ Kc3 7.Kxd5 Kxb4 8.Kc6 Kc3 9.Kxb6 b4 10.Kb5
 12/24	00:00	 1.133k	19.884k	+0,02	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Kxd5 Rxb4 7.Ne5+ Kc3 8.Rh3+ Kc2 9.Rh6 Rb1 10.Rxg6 Rd1+ 11.Ke4
 13/20	00:00	 1.249k	19.827k	+0,02	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Kxd5 Rxb4 7.Ne5+ Kc3 8.Rh3+ Kc2 9.Rh6 Rb1 10.Rxg6 Rd1+ 11.Ke4
 14/21	00:00	 1.976k	19.565k	+0,02	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Kxd5 Rxb4 7.Ne5+ Kc3 8.Rh3+ Kc2 9.Rg3 Rh4 10.Rxg6 b4
 15/29	00:00	 3.506k	19.159k	+0,01	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Ne5+ Kc3 7.Kxd5 Rxb4 8.Rh3+ Kc2 9.Rg3 Rh4 10.Rg2+ Kb3 11.Rxg6 Ka2 12.Rxb6
 16/25	00:00	 3.886k	19.334k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Ne5+ Kc3 7.Kxd5 Rxb4 8.Rh3+ Kc2 9.Rg3 Rb1 10.Rg2+ Kb3 11.Kc6 Rd1 12.Kxb6 b4 13.Rg5
 17/24	00:00	 4.615k	19.471k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Ne5+ Kc3 7.Kxd5 Rxb4 8.Rh3+ Kc2 9.Rg3 Rb1 10.Rg2+ Kc3 11.Rxg6 Rd1+ 12.Kc6 b4
 18/26	00:00	 12.798k	19.965k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Ne5+ Kc3 7.Kxd5 Rxb4 8.Rh3+ Kc2 9.Rg3 Rb1 10.Rg2+ Kc3 11.Rxg6 Rd1+ 12.Kc6 b4 13.Kxb6
 19/27	00:00	 12.880k	20.000k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Ne5+ Kc3 7.Kxd5 Kxb4 8.Kc6 Kc3 9.Kxb6 b4 10.Rh3+ Kc2 11.Kc5 Re1 12.Nc6 b3 13.Nd4+ Kb2 14.Kc4
 20/28	00:00	 12.971k	20.018k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Ne5+ Kc3 7.Kxd5 Kxb4 8.Kc6 Kc3 9.Kxb6 b4 10.Rh3+ Kc2 11.Kc5 Re1 12.Nc6 b3 13.Nd4+ Kb1 14.Nxb3
 21/28	00:00	 13.381k	20.121k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Ne5+ Kc3 7.Kxd5 Kxb4 8.Kc6 Kc3 9.Kxb6 b4 10.Rh3+ Kc2 11.Kc5 Re1 12.Nc6 b3 13.Nd4+ Kb1 14.Nxb3
 22/28	00:00	 17.246k	20.337k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Ne5+ Kc3 7.Kxd5 Kxb4 8.Kc6 Kc3 9.Kxb6 b4 10.Rh3+ Kc2 11.Kc5 Re1 12.Nc6 b3 13.Nd4+ Kb1 14.Nxb3
 23/28	00:00	 17.645k	20.422k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Ne5+ Kc3 7.Kxd5 Kxb4 8.Kc6 Kc3 9.Kxb6 b4 10.Rh3+ Kc2 11.Kc5 Re1 12.Nc6 b3 13.Nd4+ Kb1 14.Nxb3
 24/28	00:01	 24.082k	21.311k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Ne5+ Kc3 7.Kxd5 Kxb4 8.Kc6 Kc3 9.Kxb6 b4 10.Rh3+ Kc2 11.Kc5 Re1 12.Nc6 b3 13.Nd4+ Kb1 14.Nxb3
 25/28	00:01	 25.849k	21.595k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Ne5+ Kc3 7.Kxd5 Kxb4 8.Kc6 Kc3 9.Kxb6 b4 10.Rh3+ Kc2 11.Kc5 Re1 12.Nc6 b3 13.Nd4+ Kb1 14.Nxb3
 26/28	00:01	 37.888k	22.865k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Ne5+ Kc3 7.Kxd5 Kxb4 8.Kc6 Kc3 9.Kxb6 b4 10.Rh3+ Kc2 11.Kc5 Re1 12.Nc6 b3 13.Nd4+ Kb1 14.Nxb3
 27/28	00:02	 51.171k	23.259k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Ne5+ Kc3 7.Kxd5 Kxb4 8.Kc6 Kc3 9.Kxb6 b4 10.Rh3+ Kc2 11.Kc5 Re1 12.Nc6 b3 13.Nd4+ Kb1 14.Nxb3
 28/28+	00:03	 77.799k	22.715k	+0,08	1.Re5
 28/28+	00:03	 81.312k	22.687k	+0,16	1.Re5
 28/28+	00:04	 108.726k	22.487k	+1,03	1.Re5
 28/28	00:05	 129.055k	22.320k	+1,25	1.Re5 Kf1 2.Kf3 d4 3.Re2 Re6 4.Rb2 Ke1 5.Ndf2 Rf1 6.Rb1+ Kd2 7.Rxf1 Re1 8.Ne4+ Rxe4 9.Kxe4
 29/17+	00:06	 134.174k	22.303k	+1,24	1.Re5
 29/17+	00:06	 134.603k	22.300k	+1,28	1.Re5
 29/17+	00:06	 134.889k	22.296k	+1,36	1.Re5
 29/17	00:13	 282.719k	21.739k	+1,35	1.Re5 Kf1 2.Kf3 d4 3.Re2 Re6 4.Rb2 Re1 5.Rf2+ Kg1 6.Nge3 dxe3 7.Nxe3 Rxe3+ 8.Kxe3 g5 9.Kf3 g4+ 10.Kg3
 30/18+	00:13	 284.873k	21.736k	+1,50	1.Re5
 30/23+	00:13	 291.112k	21.734k	+1,55	1.Re5
 30/23+	00:13	 298.034k	21.713k	+1,89	1.Re5
 30/23	00:14	 325.376k	21.849k	+2,70	1.Re5 Kf1 2.Kf3 d4 3.Re2 Re6 4.Rb2 Ke1 5.Ndf2 Rf1 6.Rb1+ Kd2 7.Rxf1 f5 8.Rd1+ Kc3 9.Nxh2 Kxb4
 31/18	00:18	 399.575k	22.044k	+2,68	1.Re5 Kf1 2.Kf3 d4 3.Re2 Re6 4.Ra2 Ke1 5.Ndf2 Rf1 6.Ra1+ Kd2 7.Rxf1 Kc3 8.Nxh2 Re3+ 9.Kg2 Re2
 32/19-	00:20	 467.427k	22.312k	+2,56	1.Re5 d4
 32/19	00:22	 498.815k	22.473k	+2,62	1.Re5 d4 2.Re1+ Kg2 3.Re2+ Kf1 4.Kf3 Re6 5.Rb2 Ke1 6.Ndf2 Rf1 7.Rb1+ Kd2 8.Rxf1 h1Q+ 9.Rxh1 f5
 33/18	00:25	 568.229k	22.625k	+2,59	1.Re5 d4 2.Re1+ Kg2 3.Re2+ Kf1 4.Kf3 Re6 5.Rb2 Ke1 6.Ndf2 Rf1 7.Rb1+ Kd2 8.Rxf1 h1R 9.Rxh1 f5
 34/18	00:30	 681.141k	22.671k	+2,65	1.Re5 d4 2.Re1+ Kg2 3.Re2+ Kf1 4.Kf3 Re6 5.Rb2 Ke1 6.Ndf2 Rf1 7.Rb1+ Kd2 8.Rxf1 h1R 9.Rxh1 f5
 35/16	00:37	 860.394k	22.822k	+2,70	1.Re5 d4 2.Re1+ Kg2 3.Re2+ Kf1 4.Kf3 Re6 5.Rb2 Ke1 6.Ndf2 Rf1 7.Rb1+ Kd2 8.Rxf1 h1R
 36/19-	00:49	 1.128.868k	22.952k	+2,62	1.Re5 Kf1
 36/19	00:52	 1.203.813k	22.926k	+2,64	1.Re5 d4 2.Re1+ Kg2 3.Re2+ Kf1 4.Kf3 Re6 5.Rb2 Ke1 6.Ndf2 Rf1 7.Rb1+ Kd2 8.Rxf1 h1Q+ 9.Rxh1 f5 10.Rd1+ Kc3
 37/20	01:10	 1.631.438k	23.021k	+2,56	1.Re5 d4 2.Re1+ Kg2 3.Re2+ Kf1 4.Kf3 Re6 5.Rb2 Ke1 6.Ndf2 Rf1 7.Rb1+ Kd2 8.Rxf1 h1Q+ 9.Rxh1 f5 10.Rd1+ Kc3
 38/16	02:35	 3.499.333k	22.494k	+2,59	1.Re5 d4 2.Re1+ Kg2 3.Re2+ Kf1 4.Kf3 Re6 5.Rb2 Ke1 6.Ndf2 Rf1 7.Rb1+ Kd2 8.Rxf1 Kc3 9.Nxh2
 39/18+	02:36	 3.521.072k	22.487k	+2,69	1.Re5
 39/18	06:03	 8.114.166k	22.340k	+2,68	1.Re5 Kf1 2.Kf3 d4 3.Re2 Re6 4.Rb2 Ke1 5.Ndf2 Rf1 6.Rb1+ Kd2 7.Rxf1 g5 8.Ne4+ Kc2 9.Nxg5 Rg6
 40/18+	06:53	 9.227.837k	22.294k	+2,82	1.Re5
 40/18	06:54	 9.232.602k	22.295k	+2,79	1.Re5 d4 2.Re1+ Kg2 3.Re2+ Kf1 4.Kf3 Re6 5.Ra2 Ke1 6.Ndf2 Rf1 7.Ra1+ Kd2 8.Rxf1 d3
 41/16	06:56	 9.295.988k	22.299k	+2,84	1.Re5 d4 2.Re1+ Kg2 3.Re2+ Kf1 4.Kf3 Re6 5.Ra2 Ke1 6.Ndf2 Rf1 7.Ra1+ Kd2 8.Rxf1 d3
 42/17	08:11	 11.026.377k	22.430k	+2,84	1.Re5 d4 2.Re1+ Kg2 3.Re2+ Kf1 4.Kf3 Re6 5.Ra2 Ke1 6.Ndf2 Rf1 7.Ra1+ Kd2 8.Rxf1 d3 9.Rh1

Code: Select all

FEN: 8/5p2/1p1r2p1/1p1p1R2/1P3KN1/8/7p/3N2kr w - - 0 1

ShashChess22-x86-64-avx2:
Found 513 tablebases
NNUE evaluation using nn-d0b74ce1e5eb.nnue enabled
 1/1	00:00	 549	275k	-1,09	1.Rg5
 2/2	00:00	 897	449k	+0,32	1.Rg5 d4
 3/3	00:00	 4k	2.107k	-0,88	1.Re5 f6 2.Re1+ Kg2
 4/4	00:00	 5k	2.625k	-0,06	1.Re5
 5/5	00:00	 10k	4.959k	-0,56	1.Rxf7 Kf1 2.Ke5+ Ke1 3.Kxd6
 6/6	00:00	 12k	5.828k	-0,56	1.Rxf7 Kf1 2.Ke5+ Ke1 3.Kxd6 Kxd1
 7/7	00:00	 13k	6.276k	-0,50	1.Rxf7 Kf1 2.Ke5+ Ke1 3.Kxd6 Rg1
 8/8	00:00	 17k	5.664k	+0,44	1.Rxf7 Kf1 2.Ke5+ Ke1 3.Kxd6
 9/12	00:00	 36k	11.901k	+0,01	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Kc3 6.Ne5 Kxb4
 10/14	00:00	 50k	12.424k	+0,25	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rg1 4.Rf2+ Kxd1 5.Nxh2
 11/15	00:00	 60k	12.007k	+0,12	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Ne5+ Kc3 7.Rh3+ Kxb4
 12/19	00:00	 149k	10.611k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 13/19	00:00	 171k	11.383k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 14/19	00:00	 197k	12.323k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 15/19	00:00	 228k	12.671k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 16/19	00:00	 266k	14.014k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 17/19	00:00	 347k	15.091k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 18/19	00:00	 414k	16.569k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 19/19	00:00	 469k	17.384k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 20/19	00:00	 614k	18.045k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 21/19	00:00	 736k	19.356k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 22/19	00:00	 848k	19.728k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 23/19	00:00	 983k	20.484k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 24/19	00:00	 1.178k	21.031k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 25/19	00:00	 1.512k	21.303k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 26/19	00:00	 1.716k	21.446k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 27/19	00:00	 1.994k	21.911k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 28/19	00:00	 2.355k	22.428k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 29/19	00:00	 2.628k	22.651k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 30/19	00:00	 3.141k	23.093k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 31/19	00:00	 3.456k	23.042k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 32/19	00:00	 3.883k	22.979k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 33/19	00:00	 4.448k	22.810k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 34/19	00:00	 5.169k	22.769k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kc6 Kc3 9.Kxd5 Kxb4
 35/19	00:00	 6.745k	22.942k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 36/19	00:00	 7.791k	22.913k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 37/19	00:00	 9.454k	23.001k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 38/19	00:00	 10.480k	22.933k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 39/19	00:00	 12.327k	23.042k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 40/19	00:00	 14.753k	22.908k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 41/19	00:00	 16.582k	22.871k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 42/19	00:00	 21.379k	22.671k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 43/19	00:01	 24.212k	22.671k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 44/19	00:01	 26.370k	22.596k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 45/19	00:01	 31.815k	22.676k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 46/19	00:01	 36.242k	22.722k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 47/19	00:02	 49.753k	22.462k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 48/19	00:02	 58.540k	22.585k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 49/19	00:02	 62.560k	22.561k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 50/19	00:03	 73.241k	22.460k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 51/19	00:04	 94.832k	22.552k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 52/19	00:04	 97.439k	22.576k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 53/19	00:04	 105.593k	22.558k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 54/19	00:05	 125.949k	22.551k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 55/19	00:06	 152.549k	22.516k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 56/19	00:08	 181.112k	22.462k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 57/19	00:08	 199.219k	22.528k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 58/19	00:10	 236.325k	22.541k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 59/19	00:11	 263.101k	22.562k	 0,00	1.Rxf7 Kf1 2.Ke5+ Ke2 3.Rf2+ Kd3 4.Nb2+ Kc3 5.Kxd6 Rb1 6.Rxh2 Rxb2 7.Rxb2 Kxb2 8.Kxd5 Kc3 9.Kc6 Kxb4
 60/24+	00:18	 415.413k	22.074k	+0,03	1.Re5
 60/24+	00:18	 418.019k	22.065k	+0,07	1.Re5
 60/83+	07:39	 10.159.252k	22.127k	+2,95	1.Re5
 60/83	07:51	 10.472.390k	22.217k	+2,95	1.Re5 Kf1 2.Kf3 d4 3.Re2 Re6 4.Ra2 Ke1 5.Ndf2 Rf1 6.Ra1+ Kd2 7.Rxf1 h1Q+ 8.Rxh1 f5 9.Rd1+ Kc3 10.Nh2 Kxb4 11.Rxd4+ Kc3 12.Rd3+ Kc4 13.Nf1 b4 14.Ne3+ Kb5 15.Rd5+ Kc6 16.Rd4 Kc5 17.Rf4 Kb5 18.Nc2 Ka6 19.Rxb4 g5 20.Nd3 Re4 21.Rb1 Rh4 22.Ne3 Rh3+ 23.Kf2 Kb7 24.Ne5 Rh2+ 25.Kg1 Ra2 26.N3c4 b5 27.Rxb5+ Kc7 28.Kf1 g4 29.Nd3 Ra4 30.Nce5 Rd4 31.Kf2 Re4 32.Rc5+ Kd8
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Andrew
Posts: 231
Joined: Thu Mar 09, 2006 12:51 am
Location: Australia

Re: Study by Peter Krug

Post by Andrew »

Thanks for posting this study!

Only link to it I could find through google was this post by the author back in 2013.

https://forum.computerschach.de/cgi-bin ... l?tid=6261

Andrew
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peter
Posts: 3167
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Study by Peter Krug

Post by peter »

Vinvin wrote: ↑Fri Jul 15, 2022 3:53 am Quick test : SugaR AI ICCF 2.50 and ShashChess22 are able to find the solution (AMD 5950x@4GHz)
8/5p2/1p1r2p1/1p1p1R2/1P3KN1/8/7p/3N2kr w - - 0 1

Analysis by Sting 28 (based on Stockfish 2.1.1) 64bit:

Code: Select all

1.Rxf7 Kf1 
  +/-  (0.80 --)   Depth: 7   00:00:01  5kN
...
1.Rxf7 Kf1 2.Ke5+ Ke2 3.Kxd6 Rxd1 4.Rf2+ Kd3 5.Rxh2 Rb1 6.Rh3+ Kd2 7.Kxd5 Rxb4 8.Rg3 g5 9.Ne5 Kc2 10.Rxg5 Rf4 11.Nc6 Rc4 12.Rg2+ Kb3 13.Nd4+ Kb4 14.Rh2 Rc5+ 15.Ke4 Rg5 16.Rb2+ Ka3 17.Rb3+ Ka4 18.Rb1 Rh5 19.Ra1+ Kb4 20.Rc1 Rh4+ 21.Kd5 Rh5+ 22.Kd6 Rc5 23.Rd1 
  +/=  (0.60)   Depth: 35   00:00:47  1219MN
1.Re5 
  +/=  (0.68 ++)   Depth: 36   00:01:12  1890MN
1.Re5 
  +/-  (0.76 ++)   Depth: 36   00:01:16  2001MN
1.Re5 Re6 2.Rxe6 g5+ 3.Kg3 fxe6 4.Ndf2 Kf1 5.Nxh1 Kg1 6.Kf3 Kxh1 7.Kf2 d4 8.Kf1 e5 9.Nf2# 
  +/-  (0.88 ++)   Depth: 36   00:01:19  2092MN
1.Re5 Re6 2.Rxe6 g5+ 3.Kg3 fxe6 4.Ndf2 Kf1 5.Nxh1 Kg1 6.Kf3 Kxh1 7.Kf2 d4 8.Kf1 e5 9.Nf2# 
  +/-  (1.07 ++)   Depth: 36   00:01:24  2245MN
1.Re5 Re6 2.Rxe6 g5+ 3.Kg3 fxe6 4.Ndf2 Kf1 5.Nxh1 Kg1 6.Kf3 Kxh1 7.Kf2 d4 8.Kf1 e5 9.Nf2# 
  +/-  (1.34 ++)   Depth: 36   00:01:27  2357MN
1.Re5 Re6 2.Rxe6 g5+ 3.Kg3 fxe6 4.Ndf2 Kf1 5.Nxh1 Kg1 6.Kf3 Kxh1 7.Kf2 d4 8.Kf1 e5 9.Nf2# 
  +-  (1.75 ++)   Depth: 36   00:01:32  2517MN
1.Re5 Re6 2.Rxe6 g5+ 3.Kg3 fxe6 4.Ndf2 Kf1 5.Nxh1 Kg1 6.Kf3 Kxh1 7.Kf2 d4 8.Kf1 e5 9.Nf2# 
  +-  (2.36 ++)   Depth: 36   00:01:46  2889MN
1.Re5 Re6 2.Rxe6 g5+ 3.Kg3 fxe6 4.Ndf2 Kf1 5.Nxh1 Kg1 6.Kf3 Kxh1 7.Kf2 d4 8.Kf1 e5 9.Nf2# 
  +-  (3.27 ++)   Depth: 36   00:02:20  3621MN
1.Re5 d4 2.Re1+ Kg2 3.Re2+ Kf1 4.Kf3 Re6 5.Ra2 Ke1 6.Ndf2 Rf1 7.Ra1+ Kd2 8.Rxf1 f5 9.Nxh2 Rd6 10.Rd1+ Kc3 11.Rc1+ Kxb4 12.Nd3+ Ka4 13.Kf4 Re6 14.Ne5 b4 15.Ra1+ Kb5 16.Nhf3 Kc5 17.Rc1+ Kd5 18.Rb1 Kc5 
  +-  (2.90)   Depth: 36   00:03:33  4957MN
1.Re5 d4 
  +-  (2.78 --)   Depth: 37   00:03:38  5052MN
1.Re5 d4 2.Re1+ Kg2 3.Re2+ Kf1 4.Kf3 Re6 5.Ra2 Ke1 6.Ndf2 Rf1 7.Ra1+ Kd2 8.Rxf1 f5 9.Rd1+ Kc3 10.Nxh2 Kxb4 11.Rxd4+ Kc3 12.Rd3+ Kc4 13.Nf1 b4 14.Rd7 Kc3 15.Ng3 Kc4 16.Ne2 g5 17.Rd4+ Kb3 18.Ng3 Re5 19.Rxb4+ Ka3 20.Rxb6 Rd5 21.Rb2 Kxb2 22.Ne2 Kc2 23.Nd3 Rxd3+ 24.Kg2 Kd1 25.Ng3 
  +-  (2.66 --)   Depth: 37   00:03:40  5084MN
Second best of three trials with 30 threads of 16x3.5GHz CPU and 8G hash. Best was 15",third one 3'11"
regards
Peter.
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Vinvin
Posts: 5222
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Study by Peter Krug

Post by Vinvin »

I started a test with a bunch of engines.
10 min by move, 16 cores.
->
Black-Diamond-v13.1-x86-64-avx2
Blue Marlin 15.1-avx2
Bluefish-v13.1-x86-64-avx2
Corchess-2022-05-29_x64_avx2
Crystal 3.1 avx2
Crystal 3.2 x64 avx2
Crystal.4.0.x64.avx2
Crystal 4.1 x64 avx2
Crystallite 1.1a-avx2
Honey-v14-x86-64-avx2
Houdidit 6.03-modern
ShashChess21-x86-64-avx2
ShashChess22-x86-64-avx2
Sting-sf-27
Sting-sf-28
Stockfish_22070910_x64_avx2
SugaR AI ICCF 2.40 avx2
SugaR AI ICCF 2.50 avx2
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User avatar
Ajedrecista
Posts: 1950
Joined: Wed Jul 13, 2011 9:04 pm
Location: Madrid, Spain.

Re: Study by Peter Krug (Olimpiya Dunyasi 2011, 1st commendation).

Post by Ajedrecista »

Hello Andrew:
Andrew wrote: ↑Fri Jul 15, 2022 10:29 am Thanks for posting this study!

Only link to it I could find through google was this post by the author back in 2013.

https://forum.computerschach.de/cgi-bin ... l?tid=6261

Andrew
I found the source of this problem and all of the problems of the competition thanks to the valuable link you posted. Key words: 'Olimpiya Dunyasi 2011':

Award Files (www.arves.org)

Looking into 'Magazine Tys' tab, there is a PDF and a PGN of the competition:

Report (PDF in Russian language)

PGN

The problem of this thread is 'Study 716', as stated in the link from CSS-Forum.

Regards from Spain.

Ajedrecista.
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Paloma
Posts: 1163
Joined: Thu Dec 25, 2008 9:07 pm

Re: Study by Peter Krug

Post by Paloma »

Vinvin wrote: ↑Fri Jul 15, 2022 5:01 pm I started a test with a bunch of engines.
10 min by move, 16 cores.
->
Black-Diamond-v13.1-x86-64-avx2
Blue Marlin 15.1-avx2
Bluefish-v13.1-x86-64-avx2
Corchess-2022-05-29_x64_avx2
Crystal 3.1 avx2
Crystal 3.2 x64 avx2
Crystal.4.0.x64.avx2
Crystal 4.1 x64 avx2
Crystallite 1.1a-avx2
Honey-v14-x86-64-avx2
Houdidit 6.03-modern
ShashChess21-x86-64-avx2
ShashChess22-x86-64-avx2
Sting-sf-27
Sting-sf-28
Stockfish_22070910_x64_avx2
SugaR AI ICCF 2.40 avx2
SugaR AI ICCF 2.50 avx2

Hi Vincent, what were the results ??
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