Victory from the mouth of defeat

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Dann Corbit
Posts: 12542
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Victory from the mouth of defeat

Post by Dann Corbit »

1r4k1/r1b3p1/1p1pppP1/qbPP4/n7/2P5/PP3P2/KQ3RRR w - - acd 29; acs 32; bm Rh8+; c0 "http://rybkaforum.net/cgi-bin/rybkaforu ... ?tid=10161"; c1 "Carl Bicknell"; c3 "Rh8+"; ce 32742; dm 13; pm Rh8+; pv Rh8+ Kxh8 Rh1+ Kg8 Rh8+ Kxh8 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 Qh7+ Kf8 Qh8+ Ke7 Qxg7+ Kd8 c6 Bxc6 dxc6 Ke8 Qd7+ Kf8 Qf7+;
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.
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MikeB
Posts: 4889
Joined: Thu Mar 09, 2006 6:34 am
Location: Pen Argyl, Pennsylvania

Re: Victory from the mouth of defeat

Post by MikeB »

Dann Corbit wrote: ↑Tue Jul 24, 2018 10:15 pm 1r4k1/r1b3p1/1p1pppP1/qbPP4/n7/2P5/PP3P2/KQ3RRR w - - acd 29; acs 32; bm Rh8+; c0 "http://rybkaforum.net/cgi-bin/rybkaforu ... ?tid=10161"; c1 "Carl Bicknell"; c3 "Rh8+"; ce 32742; dm 13; pm Rh8+; pv Rh8+ Kxh8 Rh1+ Kg8 Rh8+ Kxh8 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 Qh7+ Kf8 Qh8+ Ke7 Qxg7+ Kd8 c6 Bxc6 dxc6 Ke8 Qd7+ Kf8 Qf7+;
nice one:

McBrain 9.6

Code: Select all

 32	  #13 	1.15G	0:45.85	Rh8+ Kxh8 Rh1+ Kg8 Rh8+ Kxh8 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 Qh7+ Kf8 Qh8+ Ke7 Qxg7+ Kd8 c6 Bxc6 dxc6 Ke8 Qf7+ Kd8 Qd7# 
 31	  #13 	1.12G	0:44.92	Rh8+ Kxh8 Rh1+ Kg8 Rh8+ Kxh8 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 Qh7+ Kf8 Qh8+ Ke7 Qxg7+ Kd8 c6 Bxc6 dxc6 Ke8 Qf7+ Kd8 Qd7# 
 30	  #13!	963.4M	0:39.22	Rh8+! 
 30	 -0.08!	963.3M	0:39.22	Rh8+! 
 30	 -5.34!	926.8M	0:37.82	Rg3! 
 30	 -5.42!	902.7M	0:36.84	Rg3! 
 30	 -5.49!	862.2M	0:35.16	Rg3! 
 30	 -5.57!	836.2M	0:34.09	Rg3! 
 30	 -5.64!	815.4M	0:33.22	Rg3! 
 30	 -5.72!	804.5M	0:32.76	Rg3! 
 30	 -5.79!	693.7M	0:28.21	Rg3! 
 30	 -5.87!	671.6M	0:27.30	Rg3! 
 30	 -5.94!	651.9M	0:26.48	Rg3! 
 30	 -6.02!	641.3M	0:26.02	Rg3! 
 30	 -6.09!	621.2M	0:25.20	Rg3! 
 30	 -6.17!	606.1M	0:24.58	Rg3! 
 30	 -6.24!	584.7M	0:23.68	Rg3! 
 30	 -6.32!	561.1M	0:22.72	Rg3! 
 30	 -6.39!	548.6M	0:22.21	Rg3! 
 29	 -6.47 	424.2M	0:17.25	Rh3 Nxc5 b4 Qa4 Rgh1 Kf8 bxc5 Bxf1 Rxf1 dxc5 Re1 Qc4 Rh8+ Ke7 Rxe6+ Kd7 Rxb8 Bxb8 Qc2 Bd6 Re2 Ra3 Re3 Qxd5 Qe2 Kc7 Kb1 b5 Rd3 Rxa2 Rxd5 Rxe2 Rh5 Rxf2 Rh7 Be5 Rxg7+ Kc6 Rh7 Bxc3 Rh3 Be5 g7 Rg2 g8=Q Rxg8 
 29	 -6.25!	320.1M	0:13.18	Rh3! 
 28	 -6.33 	296.3M	0:12.22	Rh3 Nxc5 b4 Qa4 Rgh1 Kf8 bxc5 Bxf1 Rxf1 dxc5 Re1 Qc4 Rh8+ Ke7 Rxe6+ Kd7 Rxb8 Bxb8 Qc2 Bd6 Re3 b5 Kb1 Kc7 Re1 Be5 Re4 Qxd5 f4 Bd6 Re1 Bxf4 Re7+ Kb6 Rxa7 Kxa7 a4 Qc4 axb5 Kb6 Kb2 Be5 Qb3 Qxb3+ Kxb3 Bxc3 Kc4 
 27	 -6.21 	173.9M	0:07.32	Rh3 Nxc5 b4 Qa4 Rgh1 Kf8 bxc5 Bxf1 Rxf1 dxc5 Re1 Qc4 Rh8+ Ke7 Rxe6+ Kd7 Rxb8 Bxb8 Qc2 Bd6 Re4 Qxd5 Ra4 Rxa4 Qxa4+ Ke6 Qb3 Qxb3 axb3 Be5 Kb2 b5 f4 Bxf4 Ka3 Kf5 c4 b4+ Ka4 Be5 Kb5 Bd4 Kc6 Kxg6 Kd5 
 27	 -6.04!	140.1M	0:05.96	Rh3! 
 26	 -6.11 	137.7M	0:05.86	Rh3 Nxc5 b4 Qa4 Rgh1 Kf8 bxc5 Bxf1 Rxf1 dxc5 Re1 Qc4 Rh8+ Ke7 Rxe6+ Kd7 Rxb8 Bxb8 Qc2 Bd6 Re2 Ra3 Re4 Qxd5 c4 Be5+ Kb1 Qa8 Qd2+ Kc7 Re3 Rxe3 Qxe3 Qg2 Kc2 
 25	 -6.06 	132.9M	0:05.67	Rh3 Nxc5 b4 Qa4 Rgh1 Kf8 bxc5 Bxf1 Rxf1 dxc5 Re1 Qc4 Rh8+ Ke7 Rxe6+ Kd7 Rxb8 Bxb8 Qc2 Bd6 Re4 Qxd5 Ra4 Rxa4 Qxa4+ Ke6 Qe8+ Kf5 Qe2 Kg5 Kb1 Be5 c4 Qd4 Kc2 Qc3+ Kd1 Qa1+ Kd2 Qxa2+ Kd3 Qb1+ Qc2 Qf1+ Qe2 Qxe2+ Kxe2 Kxg6 
 24	 -5.86 	91.4M  	0:03.95	Rh3 Nxc5 b4 Qa4 Rgh1 Kf8 Re1 Bc4 bxc5 Bxd5 Re2 dxc5 Rh8+ Ke7 Rxb8 Bxb8 Rh7 Be5 Re3 Qxa2+ Qxa2 Rxa2+ Kb1 Rxf2 Rxg7+ Kd6 Ra7 Rg2 Ra4 f5 Ra6 Be4+ Rxe4 fxe4 Rxb6+ Kd5 
 23	 -5.24 	41.2M  	0:01.88	Rh3 Nxc5 b4 Qa4 Rgh1 Kf8 bxc5 Bxf1 Rxf1 dxc5 Rd1 Ke7 dxe6 Be5 Rd7+ Rxd7 exd7 Kxd7 Rd3+ Ke7 Qb3 Qxb3 axb3 Ke6 Rf3 f5 Kb1 Ra8 Kb2 Kf6 Rd3 Kxg6 Rd7 Rb8 Kc2 Kg5 
 22	 -5.52 	20.8M  	0:01.03	Rh3 Nxc5 b4 Qa6 Rgh1 Kf8 bxc5 Bxf1 Rxf1 bxc5 Rh8+ Ke7 Rxb8 Bxb8 Re1 e5 Qc2 Qc4 Rh1 Qxd5 Rh8 Bc7 Rh7 Qg8 c4 Ba5 a4 Bb4 Qb3 Be1 Kb2 Bxf2 
 21	 -5.16 	13.6M  	0:00.71	Rh3 Nxc5 b4 Qa6 Rgh1 Kf8 bxc5 Bxf1 Rxf1 bxc5 Rh8+ Ke7 Rxb8 Bxb8 Re1 e5 Rh1 Qc4 Rh7 Qxc3+ Qb2 Qe1+ Qb1 Qxb1+ Kxb1 f5 Rxg7+ Kf6 Rg8 Bc7 g7 c4 f4 e4 Kc2 Ba5 Rc8 Rxg7 Rxc4 Rg6 Rc6 Rg2+ Kb3 
 20	 -4.93 	12.1M  	0:00.64	Rh3 Nxc5 b4 Qa6 Rgh1 Kf8 bxc5 Bxf1 Rxf1 bxc5 Rh8+ Ke7 Rxb8 Bxb8 Re1 e5 Rh1 Qc4 Rh7 Qxc3+ Qb2 Qe1+ Qb1 Qxb1+ Kxb1 f5 Rxg7+ Kf6 Rg8 Bc7 g7 f4 Kb2 Kf7 Re8 Kxg7 Re6 Kf7 f3 
 19	 -5.06 	11.3M  	0:00.60	Rh3 Nxc5 b4 Qa6 Rgh1 Kf8 bxc5 Bxf1 Rxf1 bxc5 Rh8+ Ke7 Rxb8 Bxb8 Re1 e5 Rh1 Qc4 Rh7 Qxc3+ Qb2 Qe1+ Qb1 Qxb1+ Kxb1 f5 Rxg7+ Kf6 Rg8 Bc7 g7 c4 f3 Kf7 Re8 Kxg7 Re6 Kf7 Rh6 e4 fxe4 fxe4 Kc2 
 18	 -5.05 	11.0M  	0:00.59	Rh3 Nxc5 b4 Qa6 Rgh1 Kf8 bxc5 Bxf1 Rxf1 bxc5 Rh8+ Ke7 Rxb8 Bxb8 Re1 e5 Rh1 Qc4 Rh7 Qxc3+ Qb2 Qe1+ Qb1 Qxb1+ Kxb1 f5 Rxg7+ Kf6 Rg8 Bc7 g7 c4 f3 Kf7 Re8 Kxg7 
 17	 -5.17 	10.8M  	0:00.58	Rh3 Nxc5 b4 Qa6 Rgh1 Kf8 bxc5 Bxf1 Rxf1 bxc5 Rh8+ Ke7 Rxb8 Bxb8 Re1 e5 Rh1 Qc4 Rh7 Qxc3+ Qb2 Qe1+ Qb1 Qxb1+ Kxb1 f5 Rxg7+ Kf6 Rg8 Bc7 g7 c4 f3 Kf7 Rf8+ Kxg7 Rxf5 Bd8 Rh5 Ra3 Rh2 Rxf3 Rc2 Rf4 Kb2 Bb6 Kc3 Kf6 
 16	 -4.92 	5.76M  	0:00.34	Rh3 Bxf1 Rxf1 Kf8 Rd1 Nxc5 b4 Qa6 Re1 e5 bxc5 bxc5 Qc2 Qc4 Rh8+ Ke7 Rxb8 Bxb8 Rh1 Qxd5 
 15	 -5.14 	5.16M  	0:00.31	Rh3 Bxf1 Rxf1 Kf8 Rd1 Nxc5 b4 Qa4 bxc5 bxc5 Rh8+ Ke7 Rxb8 Bxb8 f4 Qc4 dxe6 Qxc3+ Qb2 Qxb2+ Kxb2 Kxe6 
 14	 -4.95 	1.63M  	0:00.10	Rh3 Bxf1 Rxf1 Qxc5 dxe6 Kf8 f4 Qb5 Re1 Ke7 f5 d5 Rh7 Rg8 Rh4 Nc5 Qc2 Nd3 
 13	 -4.57 	1.43M  	0:00.09	Rh3 Bxf1 Rxf1 Qxc5 dxe6 Kf8 f4 Qb5 Re1 Ke7 f5 d5 Rh7 Rg8 Qc2 Be5 
 12	 -4.57 	1.09M  	0:00.07	Rh3 Bxf1 Rxf1 Nxc5 b4 Qa3 Rfh1 Kf8 bxc5 bxc5 Rh8+ Ke7 Rxb8 Bxb8 Qb2 
 11	 -6.33 	482732	0:00.03	b4 Qa6 Rh3 Bxf1 Qxf1 Qxf1+ Rxf1 bxc5 dxe6 Kf8 f4 cxb4 Rh8+ Ke7 
 10	 -6.33 	443980	0:00.03	b4 Qa6 Rh3 Bxf1 Qxf1 Qxf1+ Rxf1 bxc5 dxe6 Kf8 f4 cxb4 Rh8+ Ke7 Rxb8 
  9	 -6.24 	309298	0:00.02	b4 Qa6 cxb6 Nxb6 dxe6 Bc4 Rh3 Bxe6 Rh4 Qxa2+ Qxa2 Rxa2+ Kb1 
  8	 -3.13 	60735  	0:00.00	Rc1 bxc5 b4 Nxc3 bxa5 Nxb1 Rxb1 exd5 
  7	 -5.31 	27594  	0:00.00	cxd6 Bxd6 Re1 Nxc3 bxc3 Bc4 Qb2 Qxa2+ Qxa2 Rxa2+ Kb1 Bxd5 
  6	 -5.09 	21399  	0:00.00	cxd6 Nxc3 bxc3 Bxf1 Rxf1 Bxd6 Qb2 Qxd5 
  5	 -5.09 	18139  	0:00.00	cxd6 Nxc3 bxc3 Bxf1 Rxf1 Bxd6 
  4	 -5.15 	16189  	0:00.00	cxd6 Nxc3 bxc3 Bxf1 Rxf1 Bxd6 
  3	 -4.50 	10248  	0:00.00	b4 Qa6 dxe6 Bxf1 Rxf1 Nxc3 
  2	 -2.25 	7577    	0:00.00	b4 Qa6 
  1	 -1.44 	4407    	0:00.00	Re1 exd5 
  0	#
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Uri Blass
Posts: 10310
Joined: Thu Mar 09, 2006 12:37 am
Location: Tel-Aviv Israel

Re: Victory from the mouth of defeat

Post by Uri Blass »

Dann Corbit wrote: ↑Tue Jul 24, 2018 10:15 pm 1r4k1/r1b3p1/1p1pppP1/qbPP4/n7/2P5/PP3P2/KQ3RRR w - - acd 29; acs 32; bm Rh8+; c0 "http://rybkaforum.net/cgi-bin/rybkaforu ... ?tid=10161"; c1 "Carl Bicknell"; c3 "Rh8+"; ce 32742; dm 13; pm Rh8+; pv Rh8+ Kxh8 Rh1+ Kg8 Rh8+ Kxh8 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 Qh7+ Kf8 Qh8+ Ke7 Qxg7+ Kd8 c6 Bxc6 dxc6 Ke8 Qd7+ Kf8 Qf7+;
The position is not logical.

How did white get 3 rooks.

The only way is to promote a pawn to a rook and I see no logical reason to promote a pawn to a rook and not to a queen except stalemate and stalemate is not relevant with so many pieces on the board.
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AndrewGrant
Posts: 1759
Joined: Tue Apr 19, 2016 6:08 am
Location: U.S.A
Full name: Andrew Grant

Re: Victory from the mouth of defeat

Post by AndrewGrant »

Ethereal 10.68 gets this one pretty fast, to my surprise.

info depth 28 seldepth 61 score cp -516 lowerbound time 26179 nodes 1103689231 nps 42157000 tbhits 0 hashfull 342 pv h1h8
info depth 28 seldepth 56 score cp -502 lowerbound time 26316 nodes 1109752804 nps 42168000 tbhits 0 hashfull 343 pv h1h8
info depth 28 seldepth 55 score cp -481 lowerbound time 26570 nodes 1121106151 nps 42192000 tbhits 0 hashfull 347 pv h1h8
info depth 28 seldepth 64 score cp -450 lowerbound time 26728 nodes 1128195179 nps 42208000 tbhits 0 hashfull 349 pv h1h8
info depth 28 seldepth 66 score cp -404 lowerbound time 27258 nodes 1151784210 nps 42253000 tbhits 0 hashfull 356 pv h1h8
info depth 28 seldepth 67 score cp -335 lowerbound time 28090 nodes 1188676739 nps 42315000 tbhits 0 hashfull 369 pv h1h8
info depth 28 seldepth 64 score cp -232 lowerbound time 29083 nodes 1232724848 nps 42384000 tbhits 0 hashfull 379 pv h1h8
info depth 28 seldepth 66 score cp -78 lowerbound time 30242 nodes 1284210455 nps 42463000 tbhits 0 hashfull 395 pv h1h8
info depth 28 seldepth 67 score cp 153 lowerbound time 32285 nodes 1374999320 nps 42588000 tbhits 0 hashfull 424 pv h1h8
info depth 28 seldepth 67 score cp 499 lowerbound time 35157 nodes 1503053525 nps 42751000 tbhits 0 hashfull 466 pv h1h8
info depth 28 seldepth 68 score cp 1018 lowerbound time 37596 nodes 1612341982 nps 42884000 tbhits 0 hashfull 504 pv h1h8
info depth 28 seldepth 64 score cp 1796 lowerbound time 38075 nodes 1633439738 nps 42899000 tbhits 0 hashfull 509 pv h1h8
info depth 28 seldepth 68 score cp 2963 lowerbound time 38505 nodes 1652204314 nps 42907000 tbhits 0 hashfull 519 pv h1h8
info depth 28 seldepth 70 score cp 4713 lowerbound time 38895 nodes 1669058195 nps 42910000 tbhits 0 hashfull 523 pv h1h8
info depth 28 seldepth 69 score cp 7338 lowerbound time 38952 nodes 1671571517 nps 42912000 tbhits 0 hashfull 524 pv h1h8
info depth 28 seldepth 71 score cp 11275 lowerbound time 38954 nodes 1671636408 nps 42911000 tbhits 0 hashfull 524 pv h1h8
info depth 28 seldepth 73 score cp 17180 lowerbound time 38954 nodes 1671666691 nps 42912000 tbhits 0 hashfull 524 pv h1h8
info depth 28 seldepth 63 score cp 26037 lowerbound time 38955 nodes 1671694189 nps 42912000 tbhits 0 hashfull 524 pv h1h8
info depth 28 seldepth 77 score mate 13 time 39402 nodes 1692169308 nps 42945000 tbhits 0 hashfull 530 pv h1h8 g8h8 g1h1 h8g8 h1h8 g8h8 f1h1 h8g8 h1h8 g8h8 b1h1 h8g8 h1h7 g8f8 h7h8 f8e7 h8g7 e7e8 g7f7 e8d8 c5c6 b5c6 d5c6 a5b4 f7d7
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Dann Corbit
Posts: 12542
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Victory from the mouth of defeat

Post by Dann Corbit »

Uri Blass wrote: ↑Wed Jul 25, 2018 5:48 am
Dann Corbit wrote: ↑Tue Jul 24, 2018 10:15 pm 1r4k1/r1b3p1/1p1pppP1/qbPP4/n7/2P5/PP3P2/KQ3RRR w - - acd 29; acs 32; bm Rh8+; c0 "http://rybkaforum.net/cgi-bin/rybkaforu ... ?tid=10161"; c1 "Carl Bicknell"; c3 "Rh8+"; ce 32742; dm 13; pm Rh8+; pv Rh8+ Kxh8 Rh1+ Kg8 Rh8+ Kxh8 Rh1+ Kg8 Rh8+ Kxh8 Qh1+ Kg8 Qh7+ Kf8 Qh8+ Ke7 Qxg7+ Kd8 c6 Bxc6 dxc6 Ke8 Qd7+ Kf8 Qf7+;
The position is not logical.

How did white get 3 rooks.

The only way is to promote a pawn to a rook and I see no logical reason to promote a pawn to a rook and not to a queen except stalemate and stalemate is not relevant with so many pieces on the board.
There are times that underpromotion to rook is necessary to (for instance) prevent stalemate.

I do not know if such a thing was necessary in this case, but for me this is a really fun position, because it looks like all is lost for a while. And then checkmate.

Perhaps Carl Bicknell knows more about the position, but I do not think it matters very much. Sometimes, positions are composed for the pure joy of solving them. Even with bizarre formations. I believe you have posted a few yourself, regarding oddly imbalanced positions that probably "never occur in nature".
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.
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jorose
Posts: 360
Joined: Thu Jan 22, 2015 3:21 pm
Location: Zurich, Switzerland
Full name: Jonathan Rosenthal

Re: Victory from the mouth of defeat

Post by jorose »

I actually see it as a feature that you can add or remove rooks to the position to make it easier or harder. Winter solved it easily with 1 rook, had serious issues with 2 rooks and I did not expect to make it with three. Fortunately I forgot to close the window it was running in, so I can say that it actually was able to solve the problem with all 3 rooks in under an hour =) I think it is a fantastic position to try out a new engine on.

Code: Select all

position fen 1r4k1/r1b3p1/1p1pppP1/qbPP4/n7/2P5/PP3P2/KQ3RRR w - -
setoption name Hash value 2048
go infinite
info  depth 1 seldepth 8 time 0 nodes 93 score cp -290 pv c5d6
info  depth 2 seldepth 12 time 3 nodes 642 score cp -290 pv c5d6 c7d6
info  depth 3 seldepth 13 time 8 nodes 1791 score cp -290 pv c5d6 c7d6 d5e6
info  depth 4 seldepth 16 time 42 nodes 12302 score cp -337 pv f1e1 b5c4 c5d6 a4c3
info  depth 5 seldepth 17 time 58 nodes 24548 score cp -319 pv c5d6 c7d6 d5e6 b5c4 f1d1
info  depth 6 seldepth 19 time 95 nodes 57903 score cp -365 pv f1d1 b6c5 b1e4 e6e5 d1d2 b5d7
info  depth 7 seldepth 19 time 146 nodes 102227 score cp -347 pv d5e6 b5c4 b2b4 a5b5 g1g3 d6c5 e6e7
info  depth 8 seldepth 21 time 260 nodes 225915 score cp -310 pv h1h3 a4c5 b2b4 a5a4 b4c5 b6c5 f1e1 b5d3
info  depth 9 seldepth 24 time 350 nodes 326310 score cp -298 pv h1h3 a4c5 b2b4 a5a3 b4c5 b6c5 c3c4 b5c4 h3a3
info  depth 10 seldepth 24 time 467 nodes 439893 score cp -298 pv h1h3 b5c4 g1h1 g8f8 b2b4 a5b5 d5e6 c4e6 h3h8 f8e7
info  depth 11 seldepth 24 time 670 nodes 654448 score cp -299 pv b1e4 a4c5 h1h8 g8h8 e4h4 h8g8 h4h7 g8f8 h7h8 f8e7 h8g7
info  depth 12 seldepth 24 time 813 nodes 808380 score cp -299 pv b1e4 a4c5 h1h8 g8h8 e4h4 h8g8 h4h7 g8f8 h7h8 f8e7 h8g7 e7d8
info  depth 13 seldepth 29 time 2030 nodes 2146469 score cp -259 pv b2b4 a5a6 b1e4 a4c5 h1h8 g8h8 e4h4 h8g8 h4h7 g8f8 h7h8 f8e7 h8g7
info  depth 14 seldepth 30 time 2336 nodes 2502857 score cp -259 pv b2b4 a5a6 b1e4 a4c5 h1h8 g8h8 e4h4 h8g8 h4h7 g8f8 h7h8 f8e7 h8g7 e7d8
info  depth 15 seldepth 32 time 5620 nodes 6188241 score cp -214 pv h1h3 a4c5 b2b4 b5f1 g1f1 a5b5 f1h1 g8f8 b4c5 b5b1 h1b1 d6c5 d5e6 f8e7 b1e1
info  depth 16 seldepth 32 time 6490 nodes 7175640 score cp -226 pv h1h3 a4c5 b2b4 b5f1 g1f1 a5b5 f1h1 g8f8 b4c5 b5b1 h1b1 d6c5 d5e6 f8e7 h3h7 e7e6
info  depth 17 seldepth 32 time 7602 nodes 8442778 score cp -226 pv h1h3 a4c5 b2b4 b5f1 g1f1 a5b5 f1h1 g8f8 b4c5 b5b1 h1b1 d6c5 d5e6 f8e7 h3h7 e7e6 h7g7
info  depth 18 seldepth 35 time 10875 nodes 12171131 score cp -231 pv h1h3 a5a6 g1h1 g8f8 c5d6 c7d6 f1d1 a4c5 b2b4 b5c4 h3h8 f8e7 b4c5 a6a2 b1a2 a7a2 a1b1 b6c5
info  depth 19 seldepth 35 time 14717 nodes 16598028 score cp -227 pv h1h3 a4c5 b2b4 b5f1 g1f1 a5b5 f1h1 g8f8 b4c5 b5b1 h1b1 d6c5 d5e6 f8e7 h3h7 e7e6 h7g7 b8a8 b1b2
info  depth 20 seldepth 35 time 19672 nodes 22313408 score cp -236 pv h1h3 a4c5 b2b4 b5f1 g1f1 a5b5 f1h1 g8f8 h3e3 b8a8 h1h8 f8e7 h8a8 a7a8 b4c5 b5c5 d5e6 a8a4 b1d3 b6b5
info  depth 21 seldepth 35 time 25405 nodes 29021303 score cp -238 pv h1h3 a4c5 b2b4 b5f1 g1f1 a5b5 f1h1 g8f8 h3e3 b8a8 h1h8 f8e7 h8a8 a7a8 b4c5 b5c5 d5e6 a8a4 b1d3 b6b5 a1b1
info  depth 22 seldepth 35 time 49638 nodes 52535377 score cp -255 pv h1h3 a4c5 b2b4 b5f1 g1f1 a5b5 f1h1 g8f8 h3e3 b8a8 h1h8 f8e7 h8a8 a7a8 b4c5 b5c5 e3e6 e7f8 b1d3 c5f2 e6e2 f2f1
info  depth 23 seldepth 38 time 193916 nodes 199948893 score cp -199 pv c5c6 b5e2 b1e4 a5d5 e4d5 e6d5 f1e1 e2f3 h1h3 a4c5 a2a3 f3e4 f2f3 e4f5 h3h5 f5e6 g1h1 g8f8 c3c4 a7a5 h5h8 f8e7 c4d5
info  depth 24 seldepth 38 time 209201 nodes 216591622 score cp -196 pv c5c6 b5e2 b1e4 a5d5 e4d5 e6d5 f1e1 e2f3 h1h3 a4c5 a2a3 f3e4 f2f3 e4f5 h3h5 f5d3 e1e7 c5b3 a1a2 d3c4 h5h7 b3d2 a2a1 g8f8
info  depth 25 seldepth 42 time 489155 nodes 496504579 score cp -195 pv c5c6 g8f8 f1e1 e6e5 b1f5 a4c5 a2a3 f8e7 h1h4 b5d3 f5h3 d3c2 e1e3 b8d8 h3g4 b6b5 g4e2 c2b3 c3c4 b5c4 e3b3 c5b3 a1a2 a5d5 h4c4
info  depth 26 seldepth 44 time 549447 nodes 559118866 score cp -185 pv c5c6 g8f8 f1e1 e6e5 b1f5 a4c5 a2a3 f8e7 h1h7 b8g8 g1g4 b5d3 f5f3 a7a8 a1a2 b6b5 e1e3 d3c2 f3g2 c5b3 e3e1 b3d2 g4b4 d2c4 b4c4 b5c4
info  depth 27 seldepth 47 time 732365 nodes 753919331 score cp -234 pv c5c6 g8f8 f1e1 a4c5 a2a3 b5c4 b1d1 e6e5 g1g4 c5b3 a1a2 c4d5 c3c4 d5h1 e1h1 b3d4 h1h8 f8e7 h8h7 a5c5 h7g7 e7e6 d1d3 d6d5 c4d5 c5d5 a2b1
info  depth 28 seldepth 48 time 3501497 nodes 3947303690 score mate 13 pv h1h8 g8h8 g1h1 h8g8 h1h8 g8h8 f1h1 h8g8 h1h8 g8h8 b1h1 h8g8 h1h7 g8f8 h7h8 f8e7 h8g7 e7d8 c5c6 b5c6 d5c6 d8e8 g7f7 e8d8 f7d7
-Jonathan
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JVMerlino
Posts: 1357
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Location: San Francisco, California

Re: Victory from the mouth of defeat

Post by JVMerlino »

The King was always a great finder of these kinds of mates. It announces Mate in 13 in about 0.3 seconds, at depth 6 with only 208041 nodes.
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Dann Corbit
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Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Victory from the mouth of defeat

Post by Dann Corbit »

JVMerlino wrote: ↑Thu Jul 26, 2018 5:26 am The King was always a great finder of these kinds of mates. It announces Mate in 13 in about 0.3 seconds, at depth 6 with only 208041 nodes.
Some of the oldies are still really goodies.
Critter also springs to mind.
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.
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Eelco de Groot
Posts: 4567
Joined: Sun Mar 12, 2006 2:40 am
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Re: Victory from the mouth of defeat

Post by Eelco de Groot »

Dann Corbit wrote: ↑Thu Jul 26, 2018 8:22 am
JVMerlino wrote: ↑Thu Jul 26, 2018 5:26 am The King was always a great finder of these kinds of mates. It announces Mate in 13 in about 0.3 seconds, at depth 6 with only 208041 nodes.
Some of the oldies are still really goodies.
Critter also springs to mind.
It is also a bit humbling, considering that that specific matesearching code from Johan de Koning is probably almost as old as the CSVN. If I'm not mistaken that CSVN (Computer Schaak Vereniging Nederland) is almost 40 years old. Jubilee?

Compared to that, Critter like Stockfish is nothing but a critter :)

Kaissa can find Mate in 13 in about 5 minutes at the moment:

1r4k1/r1b3p1/1p1pppP1/qbPP4/n7/2P5/PP3P2/KQ3RRR w - -

Engine: Kaissa IV 014 (one thread, 512 MB, i7 6700)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott

21/49 0:01 -5.21 1.Rh3 Nxc5 2.b4 Qa6 3.Rgh1 Kf8
4.bxc5 Bxf1 5.Rxf1 bxc5 6.Rh8+ Ke7
7.Rxb8 Bxb8 8.Re1 e5 9.Rh1 Qc4
10.Rh8 Qxc3+ 11.Qb2 Qe1+ 12.Qb1 Qxb1+
13.Kxb1 Bc7 14.Rg8 (3.275.036) 2046

22/45 0:02 -4.97 1.Rh3 Nxc5 2.b4 Qa4 3.Rgh1 Kf8
4.bxc5 Bxf1 5.Rxf1 bxc5 6.Rh8+ Ke7
7.Rxb8 Bxb8 8.Re1 e5 9.Rh1 Qc4
10.Rh7 Qxc3+ 11.Qb2 Qd4 12.Rxg7+ Kf8
13.Rh7 Kg8 14.Rh4 (4.264.708) 2040

23/43 0:02 -4.76 1.Rh3 Nxc5 2.b4 Qa4 3.Rgh1 Kf8
4.bxc5 Bxf1 5.Rxf1 bxc5 6.Rh8+ Ke7
7.Rxb8 Bxb8 8.Re1 e5 9.Rh1 Qc4
10.Rh7 Qxc3+ 11.Qb2 Qd4 12.Rxg7+ Kf8
13.Rh7 Kg8 14.Qxd4 (5.417.541) 2039

24/39 0:03 -4.83-- 1.Rh3 Nxc5 (6.265.311) 2046

24/39 0:03 -4.91-- 1.Rh3 Nxc5 (6.350.745) 2047

24/39 0:03 -5.02-- 1.Rh3 Nxc5 (6.530.366) 2045

24/39 0:03 -5.17-- 1.Rh3 Nxc5 (6.959.476) 2044

24/39 0:03 -5.37-- 1.Rh3 Nxc5 (7.309.615) 2040

24/43 0:03 -5.20++ 1.Rh3 (7.733.490) 2026

24/47 0:03 -5.24 1.Rh3 Nxc5 2.b4 Qa4 3.Rgh1 Kf8
4.bxc5 Bxf1 5.Rxf1 bxc5 6.Rh8+ Ke7
7.Rxb8 Bxb8 8.Re1 e5 9.Re4 Qa6 10.c4 Qa4
11.Re2 Bc7 12.Qc2 Qxc2 13.Rxc2 f5
14.Rc3 (8.031.401) 2019
.
.
.
37/59 2:46 -5.96 1.b4 Qa6 2.c6 Bxc6 3.dxc6 d5 4.Rc1 Be5
5.Rh3 Qc4 6.Rgh1 Kf8 7.Qd3 Qxb4
8.Qb1 Qa3 9.Rc2 Nxc3 10.Qb2 Qxa2+
11.Qxa2 Nxa2+ 12.Kb1 Nb4 13.Rb2 Nxc6
14.Rh8+ (349.313.467) 2099

38/57 3:03 -6.04-- 1.b4 Qa6 (385.214.661) 2102

38/57 3:17 -6.11-- 1.b4 Qa6 (416.248.603) 2105

38/57 3:24 -6.22-- 1.b4 Qa6 (431.950.654) 2107

38/57 3:40 -6.13++ 1.Rh3 (464.749.488) 2111

38/57 3:45 -6.29 1.Rh3 Nxc5 2.b4 Qa4 3.Rgh1 Kf8
4.bxc5 Bxf1 5.Rxf1 bxc5 6.Rh8+ Ke7
7.Rxb8 Bxb8 8.Re1 e5 9.Re4 Qa6 10.c4 Bc7
11.Qb3 f5 12.Re3 Qa4 13.Kb2 Kf6
14.Qxa4 (476.542.150) 2111

39/52 4:20 -6.36-- 1.Rh3 Nxc5 (552.753.636) 2119

39/57 4:42 -6.44-- 1.Rh3 Nxc5 (600.273.946) 2124

39/57 5:02 -5.41++ 1.Rh8+ (643.988.723) 2129

39/57 5:03 -4.96++ 1.Rh8+ (646.801.455) 2130

39/57 5:04 -4.76++ 1.Rh8+ (648.836.162) 2131

39/57 5:04 -4.42++ 1.Rh8+ (649.631.010) 2131

39/57 5:04 -4.07++ 1.Rh8+ (650.069.043) 2131

39/57 5:05 -3.65++ 1.Rh8+ (651.018.687) 2132

39/57 5:05 -3.19++ 1.Rh8+ (651.501.860) 2132

39/57 5:06 -2.61++ 1.Rh8+ (652.655.072) 2132

39/57 5:06 -1.96++ 1.Rh8+ (653.152.320) 2132

39/57 5:06 -1.20++ 1.Rh8+ (653.706.386) 2132

39/57 5:06 -0.29++ 1.Rh8+ (653.958.472) 2132

39/57 5:06 +0.76++ 1.Rh8+ (654.509.926) 2132

39/57 5:07 +2.08++ 1.Rh8+ (655.389.843) 2133

39/57 5:07 +M17++ 1.Rh8+ (655.604.097) 2133

39/57 5:07 +M13 1.Rh8+ Kxh8 2.Rh1+ Kg8 3.Rh8+ Kxh8
4.Rh1+ Kg8 5.Rh8+ Kxh8 6.Qh1+ Kg8
7.Qh7+ Kf8 8.Qh8+ Ke7 9.Qxg7+ Kd8
10.c6 Bxc6 11.dxc6 Ke8 12.Qf7+ Kd8
13.Qd7+ (656.308.240) 2133

40/26 5:07 +M13 1.Rh8+ Kxh8 2.Rh1+ Kg8 3.Rh8+ Kxh8
4.Rh1+ Kg8 5.Rh8+ Kxh8 6.Qh1+ Kg8
7.Qh7+ Kf8 8.Qh8+ Ke7 9.Qxg7+ Kd8
10.c6 Bxc6 11.dxc6 Ke8 12.Qf7+ Kd8
13.Qd7+ (656.993.008) 2133
.
.
.
58/26 5:56 +M13 1.Rh8+ Kxh8 2.Rh1+ Kg8 3.Rh8+ Kxh8
4.Rh1+ Kg8 5.Rh8+ Kxh8 6.Qh1+ Kg8
7.Qh7+ Kf8 8.Qh8+ Ke7 9.Qxg7+ Kd8
10.c6 Bxc6 11.dxc6 Ke8 12.Qf7+ Kd8
13.Qd7+ (785.389.182) 2202

59/26 6:07 +M13 1.Rh8+ Kxh8 2.Rh1+ Kg8 3.Rh8+ Kxh8
4.Rh1+ Kg8 5.Rh8+ Kxh8 6.Qh1+ Kg8
7.Qh7+ Kf8 8.Qh8+ Ke7 9.Qxg7+ Kd8
10.c6 Bxc6 11.dxc6 Ke8 12.Qf7+ Kd8
13.Qd7+ (813.768.109) 2215

60/26 6:08 +M13 1.Rh8+ Kxh8 2.Rh1+ Kg8 3.Rh8+ Kxh8
4.Rh1+ Kg8 5.Rh8+ Kxh8 6.Qh1+ Kg8
7.Qh7+ Kf8 8.Qh8+ Ke7 9.Qxg7+ Kd8
10.c6 Bxc6 11.dxc6 Ke8 12.Qf7+ Kd8
13.Qd7+ (816.557.709) 2216

best move: Rh1-h8 time: 6:08.375 min n/s: 2.216.966 nodes: 816.557.709
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
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JVMerlino
Posts: 1357
Joined: Wed Mar 08, 2006 10:15 pm
Location: San Francisco, California

Re: Victory from the mouth of defeat

Post by JVMerlino »

Eelco de Groot wrote: ↑Thu Jul 26, 2018 4:55 pm
Dann Corbit wrote: ↑Thu Jul 26, 2018 8:22 am
JVMerlino wrote: ↑Thu Jul 26, 2018 5:26 am The King was always a great finder of these kinds of mates. It announces Mate in 13 in about 0.3 seconds, at depth 6 with only 208041 nodes.
Some of the oldies are still really goodies.
Critter also springs to mind.
It is also a bit humbling, considering that that specific matesearching code from Johan de Koning is probably almost as old as the CSVN. If I'm not mistaken that CSVN (Computer Schaak Vereniging Nederland) is almost 40 years old. Jubilee?
The version of The King that I used was from CM9000 and written in 2002.
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