Still Too Hard for Computers? Position from 2004

Discussion of computer chess matches and engine tournaments.

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Albert Silver
Posts: 3026
Joined: Wed Mar 08, 2006 9:57 pm
Location: Rio de Janeiro, Brazil

Re: Still Too Hard for Computers? Position from 2004

Post by Albert Silver »

On my Athlon 3500+ Rybka Winfinder takes 11 seconds.

2r1bq1k/2r2p1P/1p2pPp1/p2pP1N1/3P4/nPP5/R2Q2K1/2RN4 w - - 0 1

Analysis by Rybka WinFinder 2.2 32-bit:

1.Ne3
+- (1.50) Depth: 4 00:00:00
1.Ne3
± (1.20) Depth: 5 00:00:00
1.Ne3 Nb5
± (1.12) Depth: 6 00:00:00 5kN
1.Kg3 b5
± (1.20) Depth: 6 00:00:00 10kN
1.Kg3 b5 2.Qd3
± (1.12) Depth: 7 00:00:00 14kN
1.Kg3 b5 2.Kg4 a4
± (0.97) Depth: 8 00:00:00 28kN
1.Qe1 Nb5 2.Qe3 Bc6
± (1.20) Depth: 8 00:00:00 53kN
1.Qe1 b5 2.Qe3 b4 3.Kg3
² (0.60) Depth: 9 00:00:01 78kN
1.Kg3 b5 2.Kg4 a4 3.bxa4
± (0.75) Depth: 9 00:00:01 84kN
1.Nf3 Bc6 2.Qe3 b5 3.Rca1
± (1.12) Depth: 9 00:00:01 130kN
1.Nf3 Bd7 2.Ne3 Be8 3.Kg3 Nb5
± (0.97) Depth: 10 00:00:02 186kN
1.Nf3 Bd7 2.Ne3 Nb5 3.c4 Qb4 4.Ng5
± (0.82) Depth: 11 00:00:04 353kN
1.Nf3 Bd7 2.Ne3 Nb5 3.c4 Qb4 4.Ng5 Qxd2+ 5.Rxd2 Be8
± (0.75) Depth: 12 00:00:09 695kN
1.Rxa3
± (0.78) Depth: 12 00:00:11 695kN
1.Rxa3
+- (1.72) Depth: 12 00:00:13 695kN
1.Rxa3
+- (1.72) Depth: 12 00:00:13 695kN
1.Rxa3
+- (3.00) Depth: 12 00:00:16 695kN
1.Rxa3 Qxa3 2.b4 Bb5 3.Nf3 Qxc1 4.Qxc1 Kxh7 5.Ng5+ Kg8 6.Qe3 Kf8 7.Qh3
+- (3.37) Depth: 12 00:00:22 1743kN
1.Rxa3 Qxa3 2.b4 Bb5 3.Nf3 Qxc1 4.Qxc1 Kxh7 5.Ng5+ Kg8 6.Qe3 Kf8 7.Qh3 Ke8
+- (3.37) Depth: 13 00:00:28 2187kN

(Silver, Private 04.12.2007)
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Tord Romstad
Posts: 1808
Joined: Wed Mar 08, 2006 9:19 pm
Location: Oslo, Norway

Re: Still Too Hard for Computers? Position from 2004

Post by Tord Romstad »

Eelco de Groot wrote:That looks really very interesting Tord!

Have you maybe made some changes to the evaluation function in this Glaurung 120407 version?
No, only some random and poorly tested changes to reduction criterions in the search. That this version is faster than 2.0.1 in this particular position is probably nothing more than blind luck. I am sure it would be the other way in many other positions.

Tord
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ernest
Posts: 2053
Joined: Wed Mar 08, 2006 8:30 pm

Re: Still Too Hard for Computers? Position from 2004

Post by ernest »

Tord Romstad wrote:
Eelco de Groot wrote:That looks really very interesting Tord!

Have you maybe made some changes to the evaluation function in this Glaurung 120407 version?
No, only some random and poorly tested changes to reduction criterions in the search...
Tord
Isn't that all due to non-reproducibility, if more than 1 core was used? :wink:
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Tord Romstad
Posts: 1808
Joined: Wed Mar 08, 2006 9:19 pm
Location: Oslo, Norway

Re: Still Too Hard for Computers? Position from 2004

Post by Tord Romstad »

ernest wrote:
Tord Romstad wrote:
Eelco de Groot wrote:That looks really very interesting Tord!

Have you maybe made some changes to the evaluation function in this Glaurung 120407 version?
No, only some random and poorly tested changes to reduction criterions in the search...
Tord
Isn't that all due to non-reproducibility, if more than 1 core was used? :wink:
Yes, that is also an important factor. If I ran the test multiple times, it is quite likely that the depth to solution would vary.

Tord
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Vinvin
Posts: 5296
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Still Too Hard for Computers? Position from 2004

Post by Vinvin »

Stockfish 11 on 5 runs, average 10.2 seconds @ 8.5 Mn/sec

FEN: 2r1bq1k/2r2p1P/1p2pPp1/p2pP1N1/3P4/nPP5/R2Q2K1/2RN4 w - - 0 1

Code: Select all

Stockfish_20011801_x64_modern:
...
 28/44	00:09	 70 133 387	7 605 008	+2,70	1.Nb2 Rc6 2.Na4 Nb5 3.Kg3 R6c7 4.Raa1 Na7 5.Nxb6 Rb8 6.Na4 Bxa4 7.bxa4 Nc8 8.Rcb1 Nb6 9.Kf4 Rcb7 10.Qd3 Nc4 11.Rxb7 Rxb7 12.Rh1 Rb2 13.Kg3 Rb7 14.Rh2 Rb2 15.Rxb2 Nxb2
 29/37+	00:10	 76 678 038	7 625 861	+2,81	1.Nb2
 29/38+	00:10	 82 329 335	7 652 847	+2,92	1.Rxa3
 29/38+	00:11	 87 774 826	7 712 400	+7,01	1.Rxa3
 29/39	00:11	 90 160 130	7 734 419	+7,85	1.Rxa3 b5 2.Rxa5 b4 3.Ra2 bxc3 4.Rxc3 Rxc3 5.Nxc3 Rb8 6.Na4 Ra8 7.Qc1 Qb4 8.Qh1 Qf8 9.Kg3 Bxa4 10.bxa4 Rb8 11.a5


Stockfish_20011801_x64_modern:
... 29/44	00:07	 58 655 856	7 984 734	+2,02	1.Nf3 Nb5 2.Kg3 Rc6 3.Qe3 R6c7 4.Raa1 Bd7 5.Kf2 Rc6 6.Ra2 R6c7 7.Ng5 Be8 8.Kg1 Rc6 9.Kg2 R6c7 10.Kf2 Rc6 11.Kg3 R6c7 12.Nf3 Bd7 13.Rh2 Na3 14.Nb2 b5 15.Qd2
 30/40+	00:08	 68 412 833	8 115 401	+2,13	1.Rxa3
 30/40+	00:08	 68 585 291	8 116 602	+2,23	1.Rxa3
 30/40+	00:08	 68 953 741	8 117 935	+5,27	1.Rxa3
 30/40	00:08	 69 466 654	8 122 854	+6,13	1.Rxa3 Qxa3 2.b4 Rxc3 3.Nxc3 Qxb4 4.Nge4 Qf8 5.Nd6 Ra8 6.Rh1 a4 7.Qb2 b5 8.Na2 a3 9.Qd2 Bc6 10.Nb4 Bd7 11.Kf2 Be8 12.Rh3 Ra4 13.Ke1 Bd7 14.Kd1 Ra5 15.Na2


Stockfish_20011801_x64_modern:
...
 26/47+	00:04	 38 455 719	7 841 704	+2,41	1.Nf3
 26/47+	00:05	 42 827 410	7 888 636	+2,70	1.Rxa3
 26/47+	00:05	 43 122 763	7 892 160	+5,07	1.Rxa3
 26/47	00:05	 43 489 055	7 897 050	+5,38	1.Rxa3 Qxa3 2.b4 Rxc3 3.Nxc3 Qxb4 4.Nge4 Qf8 5.Nd6 Rb8 6.Rh1 Ra8 7.Kg3 a4 8.Na2 a3 9.Kg4 Rd8 10.Qb4 Ra8 11.Qxb6 Ra4 12.Rh2 Bd7


Stockfish_20011801_x64_modern:
...
 30/44	00:11	 88 554 097	7 918 635	+2,35	1.Nf3 Nb5 2.Qe3 Bd7 3.Kg1 Be8 4.Kf1 Rb8 5.Kf2 Rbc8 6.Kg3 Bd7 7.Ng5 Be8 8.Kg2 Na7 9.Nb2 Nb5 10.Na4 Rb8 11.Nf3 Na7 12.Nb2 Rbc8 13.Qd2 Bd7 14.Kg3 Bb5 15.Qe3 Bd7 16.Ng5
 31/42+	00:15	 122 391 673	8 042 031	+2,45	1.Rxa3
 31/42+	00:15	 122 398 972	8 041 982	+2,55	1.Rxa3
 31/42+	00:15	 122 462 352	8 042 975	+6,73	1.Rxa3
 31/46	00:15	 123 154 211	8 045 613	+7,23	1.Rxa3 Qxa3 2.b4 Rxc3 3.Nxc3 Qxb4 4.Nge4 Qf8 5.Nd6 Ra8 6.Rb1 a4 7.Rxb6 a3 8.Rb7 Rd8 9.Re7 Kxh7 10.Qf4 Ra8 11.Qh2+ Kg8 12.Kg3 Rd8 13.Kg4 Rb8 14.Kf3 Ra8 15.Qh1 a2 16.Nxa2
 

Stockfish_20011801_x64_modern:
...
 30/48	00:12	 96 843 917	7 932 824	+2,34	1.Nf3 Nb5 2.Qe3 Bd7 3.Ng5 Be8 4.Kg1 Rb8 5.Nb2 Rbc8 6.Na4 Rb8 7.c4 Nxd4 8.Qxd4 b5 9.Nb2 dxc4 10.Rxa5 Qb4 11.Qd6 Qc5+ 12.Qxc5 Rxc5 13.Nf3 Bc6 14.Nd4 Be8 15.bxc4 Rxe5 16.Kf2 Rh5 17.Nd3 Kxh7 18.c5 e5
 31/48+	00:13	 109 402 808	7 958 883	+2,45	1.Rxa3
 31/48+	00:13	 110 843 671	7 970 350	+2,55	1.Rxa3
 31/48+	00:14	 119 061 579	8 044 701	+7,94	1.Rxa3
 31/48	00:15	 121 163 870	8 065 224	+8,44	1.Rxa3 Qxa3 2.b4 Bc6 3.Nf3 Kxh7 4.Nf2 Qxc1 5.Ng5+ Kg8 6.Qxc1 Kf8 7.Qh1 Ke8 8.Qh8+ Kd7
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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Still Too Hard for Computers? Position from 2004

Post by zullil »

Vinvin wrote: ↑Mon Feb 17, 2020 2:41 pm Stockfish 11 on 5 runs, average 10.2 seconds @ 8.5 Mn/sec

FEN: 2r1bq1k/2r2p1P/1p2pPp1/p2pP1N1/3P4/nPP5/R2Q2K1/2RN4 w - - 0 1

Code: Select all

Stockfish_20011801_x64_modern:
...
 28/44	00:09	 70 133 387	7 605 008	+2,70	1.Nb2 Rc6 2.Na4 Nb5 3.Kg3 R6c7 4.Raa1 Na7 5.Nxb6 Rb8 6.Na4 Bxa4 7.bxa4 Nc8 8.Rcb1 Nb6 9.Kf4 Rcb7 10.Qd3 Nc4 11.Rxb7 Rxb7 12.Rh1 Rb2 13.Kg3 Rb7 14.Rh2 Rb2 15.Rxb2 Nxb2
 29/37+	00:10	 76 678 038	7 625 861	+2,81	1.Nb2
 29/38+	00:10	 82 329 335	7 652 847	+2,92	1.Rxa3
 29/38+	00:11	 87 774 826	7 712 400	+7,01	1.Rxa3
 29/39	00:11	 90 160 130	7 734 419	+7,85	1.Rxa3 b5 2.Rxa5 b4 3.Ra2 bxc3 4.Rxc3 Rxc3 5.Nxc3 Rb8 6.Na4 Ra8 7.Qc1 Qb4 8.Qh1 Qf8 9.Kg3 Bxa4 10.bxa4 Rb8 11.a5


Stockfish_20011801_x64_modern:
... 29/44	00:07	 58 655 856	7 984 734	+2,02	1.Nf3 Nb5 2.Kg3 Rc6 3.Qe3 R6c7 4.Raa1 Bd7 5.Kf2 Rc6 6.Ra2 R6c7 7.Ng5 Be8 8.Kg1 Rc6 9.Kg2 R6c7 10.Kf2 Rc6 11.Kg3 R6c7 12.Nf3 Bd7 13.Rh2 Na3 14.Nb2 b5 15.Qd2
 30/40+	00:08	 68 412 833	8 115 401	+2,13	1.Rxa3
 30/40+	00:08	 68 585 291	8 116 602	+2,23	1.Rxa3
 30/40+	00:08	 68 953 741	8 117 935	+5,27	1.Rxa3
 30/40	00:08	 69 466 654	8 122 854	+6,13	1.Rxa3 Qxa3 2.b4 Rxc3 3.Nxc3 Qxb4 4.Nge4 Qf8 5.Nd6 Ra8 6.Rh1 a4 7.Qb2 b5 8.Na2 a3 9.Qd2 Bc6 10.Nb4 Bd7 11.Kf2 Be8 12.Rh3 Ra4 13.Ke1 Bd7 14.Kd1 Ra5 15.Na2


Stockfish_20011801_x64_modern:
...
 26/47+	00:04	 38 455 719	7 841 704	+2,41	1.Nf3
 26/47+	00:05	 42 827 410	7 888 636	+2,70	1.Rxa3
 26/47+	00:05	 43 122 763	7 892 160	+5,07	1.Rxa3
 26/47	00:05	 43 489 055	7 897 050	+5,38	1.Rxa3 Qxa3 2.b4 Rxc3 3.Nxc3 Qxb4 4.Nge4 Qf8 5.Nd6 Rb8 6.Rh1 Ra8 7.Kg3 a4 8.Na2 a3 9.Kg4 Rd8 10.Qb4 Ra8 11.Qxb6 Ra4 12.Rh2 Bd7


Stockfish_20011801_x64_modern:
...
 30/44	00:11	 88 554 097	7 918 635	+2,35	1.Nf3 Nb5 2.Qe3 Bd7 3.Kg1 Be8 4.Kf1 Rb8 5.Kf2 Rbc8 6.Kg3 Bd7 7.Ng5 Be8 8.Kg2 Na7 9.Nb2 Nb5 10.Na4 Rb8 11.Nf3 Na7 12.Nb2 Rbc8 13.Qd2 Bd7 14.Kg3 Bb5 15.Qe3 Bd7 16.Ng5
 31/42+	00:15	 122 391 673	8 042 031	+2,45	1.Rxa3
 31/42+	00:15	 122 398 972	8 041 982	+2,55	1.Rxa3
 31/42+	00:15	 122 462 352	8 042 975	+6,73	1.Rxa3
 31/46	00:15	 123 154 211	8 045 613	+7,23	1.Rxa3 Qxa3 2.b4 Rxc3 3.Nxc3 Qxb4 4.Nge4 Qf8 5.Nd6 Ra8 6.Rb1 a4 7.Rxb6 a3 8.Rb7 Rd8 9.Re7 Kxh7 10.Qf4 Ra8 11.Qh2+ Kg8 12.Kg3 Rd8 13.Kg4 Rb8 14.Kf3 Ra8 15.Qh1 a2 16.Nxa2
 

Stockfish_20011801_x64_modern:
...
 30/48	00:12	 96 843 917	7 932 824	+2,34	1.Nf3 Nb5 2.Qe3 Bd7 3.Ng5 Be8 4.Kg1 Rb8 5.Nb2 Rbc8 6.Na4 Rb8 7.c4 Nxd4 8.Qxd4 b5 9.Nb2 dxc4 10.Rxa5 Qb4 11.Qd6 Qc5+ 12.Qxc5 Rxc5 13.Nf3 Bc6 14.Nd4 Be8 15.bxc4 Rxe5 16.Kf2 Rh5 17.Nd3 Kxh7 18.c5 e5
 31/48+	00:13	 109 402 808	7 958 883	+2,45	1.Rxa3
 31/48+	00:13	 110 843 671	7 970 350	+2,55	1.Rxa3
 31/48+	00:14	 119 061 579	8 044 701	+7,94	1.Rxa3
 31/48	00:15	 121 163 870	8 065 224	+8,44	1.Rxa3 Qxa3 2.b4 Bc6 3.Nf3 Kxh7 4.Nf2 Qxc1 5.Ng5+ Kg8 6.Qxc1 Kf8 7.Qh1 Ke8 8.Qh8+ Kd7
How cute that the post before yours comes from Tord Romstad and involves Glaurung. The days before Stockfish.
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