Testposition for participation on the wccc 2017.

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Thomas Lagershausen
Posts: 238
Joined: Mon Jun 11, 2007 4:59 pm

Testposition for participation on the wccc 2017.

Post by Thomas Lagershausen » Sun Jun 11, 2017 1:58 pm

I have a recommendation for the ICGA.

Please take this position of yesterdays game of Aronian against Carlsen to make sure that the participating chesssoftware is at toplevel in the developments of computerchessprogramming.

[D]r1br2k1/1p1nqppp/p1p1pn2/3p4/1bPP4/PPN1PN2/2BB1PPP/R2Q1RK1 b - - 0 11 avoiding 11...Bxa3?

The correct move 11...Bd6 ! should be found under 3 minutes of search.

Thx for your attention.
TL

Vinvin
Posts: 4334
Joined: Thu Mar 09, 2006 8:40 am
Full name: Vincent Lejeune

Re: Testposition for participation on the wccc 2017.

Post by Vinvin » Sun Jun 11, 2017 6:04 pm

3 runs with SF on 6*4GHz : 1min14sec, 46 sec and 34 sec.

r1br2k1/1p1nqppp/p1p1pn2/3p4/1bPP4/PPN1PN2/2BB1PPP/R2Q1RK1 b - - 0 11

Code: Select all

Stockfish_170606_x64_modern:
...
 29/41	00:23	 184 081k	7 874k	 0,00	11. ... Bxa3 12.Rxa3 Qxa3 13.c5 b5 14.b4 Qb2 15.Ne1 Ne4 16.Bxe4 dxe4 17.Nxe4 Qa2 18.Nd3 e5 19.Bc3 Nf6 20.Nd6 exd4 21.Bxd4 Ne8 22.Ne5 Nxd6 23.Nxc6 Nb7 24.Nxd8 Nxd8 25.Bxg7 Qe6 26.Qxd8+ Kxg7 27.Qg5+ Kh8 28.Qd8+ Kg7
 30/45+	00:24	 193 078k	7 858k	+0,07	11. ... Bxa3 12.Rxa3
 30/49-	00:25	 197 607k	7 843k	 0,00	11. ... Bxa3
 30/49	00:25	 200 360k	7 837k	 0,00	11. ... Bxa3 12.Rxa3 Qxa3 13.c5 b5 14.b4 Qb2 15.Nb1 Ne4 16.Ng5 Ndf6 17.f3 Nxd2 18.Qxd2 g6 19.Nxf7 Rf8 20.Ne5 Bb7 21.Nd3 Qa1 22.Nc3 Qa3 23.Nb1 Qa1
 31/49+	00:27	 215 044k	7 801k	+0,07	11. ... Bxa3 12.Rxa3
 31/49+	00:30	 232 812k	7 755k	+0,14	11. ... Bxa3 12.Rxa3
 31/49+	00:55	 409 782k	7 443k	+0,25	11. ... Bxa3 12.Rxa3
 31/49-	01:14	 541 908k	7 322k	+0,16	11. ... Bd6
 31/49	01:40	 725 836k	7 207k	+0,16	11. ... Bd6 12.Re1 dxc4 13.bxc4 e5 14.a4 Rb8 15.Qb1 h6 16.h3 b6 17.Bd3 Re8 18.Ne4 Nxe4 19.Bxe4 c5 20.a5 Nf6 21.axb6 Nxe4 22.Qxe4 Rxb6 23.Ba5 Rb3 24.Qc2 Rb8 25.Bc3 e4 26.Nd2 Bc7 27.d5 Qd6 28.Nf1 Bf5 29.Rab1 Rxb1 30.Rxb1
 32/49-	02:09	 928 131k	7 156k	+0,09	11. ... Bd6

Code: Select all

Stockfish_170606_x64_modern:
...
 28/43+	00:19	 142 119k	7 134k	 0,00	11. ... Bxa3 12.Rxa3
 28/43-	00:20	 143 310k	7 141k	-0,07	11. ... Bxa3
 28/43+	00:21	 157 061k	7 154k	+0,01	11. ... Bxa3 12.Rxa3
 28/43+	00:26	 191 632k	7 182k	+0,22	11. ... Bxa3 12.Rxa3
 28/45-	00:31	 226 117k	7 195k	+0,06	11. ... Bxa3
 28/45+	00:35	 252 470k	7 208k	+0,28	11. ... Bxa3 12.Rxa3
 28/45	00:46	 334 150k	7 227k	+0,23	11. ... Bd6 12.e4 dxe4 13.Nxe4 Nxe4 14.Bxe4 Nf6 15.Qc2 Nxe4 16.Qxe4 b6 17.b4 Bc7 18.Rfb1 h6 19.Bf4 b5 20.Bxc7 Qxc7 21.c5 Bb7 22.g3 a5 23.Rd1 Rd7 24.Kg2 Rd5 25.Qe3 axb4 26.axb4 Ra4 27.Rxa4 bxa4
 29/45-	00:48	 347 083k	7 229k	+0,16	11. ... Bd6
 29/45+	00:51	 368 491k	7 221k	+0,23	11. ... Bd6 12.e4
 29/45+	01:02	 450 609k	7 197k	+0,34	11. ... Bd6 12.e4
 29/45-	01:03	 453 533k	7 196k	+0,25	11. ... Bd6
 29/45	01:06	 475 755k	7 199k	+0,10	11. ... Bd6 12.e4 dxe4 13.Nxe4 Nxe4 14.Bxe4 Nf6 15.Bb1 c5 16.dxc5 Bxc5 17.Qc2 Bxa3 18.Ba5 Re8 19.Ne5 Bd6 20.Bc3 Bb4 21.Bb2 Kf8 22.h3 h6 23.Rd1 Rd8 24.Rxd8+ Qxd8 25.c5 Qd2 26.Qxd2 Bxd2 27.Nc4 Bb4 28.Nb6 Rb8 29.Be5 Bxc5 30.Bxb8 Bxb6
 30/45	01:10	 504 925k	7 199k	+0,10	11. ... Bd6 12.e4 dxe4 13.Nxe4 Nxe4 14.Bxe4 Nf6 15.Bb1 c5 16.dxc5 Bxc5 17.Qc2 Bxa3 18.Ba5 Re8 19.Ne5 Bd6 20.Bc3 Bb4 21.Bb2 Kf8 22.Rd1 Rd8 23.Rxd8+ Qxd8 24.c5 Qd2 25.Qxd2 Bxd2 26.Nc4 Bf4 27.Nb6 Rb8 28.Nxc8 Rxc8 29.g3 Bc7 30.Bxf6 gxf6
 31/49+	01:14	 538 089k	7 194k	+0,17	11. ... Bd6 12.e4
 31/49+	01:17	 556 469k	7 190k	+0,25	11. ... Bd6 12.e4
 31/49	01:22	 596 055k	7 185k	+0,20	11. ... Bd6 12.e4 dxe4 13.Nxe4 Nxe4 14.Bxe4 Nf6 15.Bb1 c5 16.dxc5 Bxc5 17.Qc2 Bxa3 18.Ba5 Re8 19.Ne5 Bd6 20.Bc3 Bb4 21.Bb2 h6 22.Ng4 e5 23.Nxf6+ Qxf6 24.Qh7+ Kf8 25.Ra5 g5 26.Rd5 Qg7 27.Qxg7+ Kxg7 28.Rxe5 Rxe5 29.Bxe5+ f6 30.Bb2 Rb8 31.Bc2 b5 32.Rd1 Be6 33.cxb5 Rxb5
 32/49-	01:33	 674 203k	7 190k	+0,13	11. ... Bd6
 32/49+	01:37	 700 032k	7 192k	+0,20	11. ... Bd6 12.e4
 32/49-	02:01	 866 407k	7 143k	+0,13	11. ... Bd6
 32/52+	02:04	 891 178k	7 137k	+0,22	11. ... Bd6 12.e4
 32/53-	02:28	 1 055 717k	7 105k	+0,10	11. ... Bd6

Code: Select all

Stockfish_170606_x64_modern:
...
 27/41	00:13	 93 977k	7 191k	 0,00	11. ... Bxa3 12.Rxa3 Qxa3 13.c5 b5 14.b4 Qb2 15.Ne1 Ne4 16.Bxe4 dxe4 17.Nxe4 Qa2 18.Nd3 Nf6 19.Nxf6+ gxf6 20.Nf4 e5 21.Nh5 Bf5 22.Qf3 Bg6 23.Nxf6+ Kg7 24.Rd1 Qe6 25.Nh5+ Kg8 26.Nf6+ Kg7
 28/44+	00:14	 107 524k	7 199k	+0,07	11. ... Bxa3 12.Rxa3
 28/44+	00:16	 115 522k	7 210k	+0,14	11. ... Bxa3 12.Rxa3
 28/44+	00:19	 141 711k	7 231k	+0,25	11. ... Bxa3 12.Rxa3
 28/44-	00:34	 246 664k	7 238k	+0,16	11. ... Bd6
 28/44+	00:43	 313 613k	7 240k	+0,28	11. ... Bd6 12.e4
 28/44	00:53	 386 643k	7 212k	+0,16	11. ... Bd6 12.Re1 dxc4 13.bxc4 e5 14.h3 Bc7 15.Qb1 h6 16.a4 Re8 17.a5 e4 18.Nh2 b5 19.axb6 Nxb6 20.Bb3 Be6 21.Nxe4 Nxc4 22.Nxf6+ Qxf6 23.Ng4 Qe7 24.Bc3 Qd6 25.Ne5 Na3 26.Qb2 Nb5 27.Bc2 a5
 29/44	01:00	 439 291k	7 208k	+0,15	11. ... Bd6 12.e4 dxe4 13.Nxe4 Nxe4 14.Bxe4 Nf6 15.Qe2 Nxe4 16.Qxe4 c5 17.Ba5 Re8 18.dxc5 Bxc5 19.b4 f5 20.Qe2 Ba7 21.c5 e5 22.Nd2 Bb8 23.Nc4 Be6 24.Rad1 e4 25.Rd4 Qf7 26.Rfd1 Bxc4 27.Qxc4 Qxc4 28.Rxc4
 30/44+	01:01	 446 317k	7 207k	+0,22	11. ... Bd6 12.e4
 30/45	01:06	 481 114k	7 212k	+0,27	11. ... Bd6 12.e4 dxe4 13.Nxe4 Nxe4 14.Bxe4 Nf6 15.Qe2 Nxe4 16.Qxe4 c5 17.Ba5 Re8 18.dxc5 Bxc5 19.b4 f5 20.Qe2 Ba7 21.c5 e5 22.Nd2 Bb8 23.Nc4 Be6 24.Nxe5 Bf7 25.f4 Bxe5 26.fxe5 Qxe5 27.Qd2 Qe3+ 28.Qxe3 Rxe3 29.Rad1 Bc4 30.Rxf5 Be6 31.Rf4 Rxa3
 31/46-	01:26	 622 043k	7 173k	+0,20	11. ... Bd6
 31/46+	01:30	 647 941k	7 167k	+0,27	11. ... Bd6 12.e4
 31/49-	01:40	 723 241k	7 168k	+0,20	11. ... Bd6
 31/49	01:41	 725 478k	7 168k	+0,20	11. ... Bd6 12.e4 dxe4 13.Nxe4 Nxe4 14.Bxe4 Nf6 15.Qe2 Nxe4 16.Qxe4 c5 17.Ba5 Re8 18.dxc5 Bxc5 19.b4 Ba7 20.c5 Bb8 21.Ne5 Bxe5 22.Qxe5 Bd7 23.Rfe1 f6 24.Qc3 e5 25.Rad1 Bc6 26.Bb6 f5 27.Re3 e4 28.f3 Qe5 29.Qxe5 Rxe5 30.Ree1
 32/49-	01:45	 754 168k	7 166k	+0,13	11. ... Bd6
 32/55+	01:57	 840 428k	7 177k	+0,20	11. ... Bd6 12.e4
 32/55-	01:58	 852 902k	7 177k	+0,13	11. ... Bd6
 32/55+	02:13	 961 149k	7 179k	+0,22	11. ... Bd6 12.e4
 32/55	02:26	 1 052 642k	7 179k	+0,31	11. ... Bd6 12.e4 dxe4 13.Nxe4 Nxe4 14.Bxe4 Nf6 15.Bg5 h6 16.Bxf6 gxf6 17.Re1 Qf8 18.b4 f5 19.Bd3 Be7 20.Qe2 Bf6 21.Qe3 Qg7 22.Ne5 b5 23.g3 Bb7 24.a4 c5 25.bxc5 Bxe5 26.dxe5 f4 27.Qxf4 Rxd3 28.axb5 axb5 29.cxb5 Rf3 30.Qc1 Rxa1 31.Qxa1 Rf4

Vinvin
Posts: 4334
Joined: Thu Mar 09, 2006 8:40 am
Full name: Vincent Lejeune

Re: Testposition for participation on the wccc 2017.

Post by Vinvin » Mon Aug 19, 2019 7:24 pm

SF regressed a lot on this one (avoiding Bxa3) : about 1 minute 2 years ago but more than 15 minutes now (6*4GHz).
SF has trouble to consider 12.Rxa3! on 11...Bxa3?

[d]r1br2k1/1p1nqppp/p1p1pn2/3p4/1bPP4/PPN1PN2/2BB1PPP/R2Q1RK1 b - - 0 11

Code: Select all

Stockfish_19081422_x64_modern:
...
 41/72+	14:16	6 242 166 796	7 291 084	+0,36	11. ... Bxa3 12.Rxa3
 41/72	26:39	11 524 379 784	7 203 615	+0,18	11. ... Bd6 12.e4 Nxe4 13.Nxe4 dxe4 14.Bxe4 Nf6 15.Bg5 c5 16.Qc2 h6 17.Bxf6 Qxf6 18.dxc5 Bxc5 19.b4 Bf8 20.Rad1 a5 21.c5 axb4 22.axb4 Rxd1 23.Rxd1 Ra1 24.g3 Bd7 25.Qd2 Ba4 26.Rxa1 Qxa1+ 27.Kg2 Bb5 28.h3 Ba6 29.Kh2 g6 30.Bd3 Bxd3 31.Qxd3 Qa2 32.Qd2 Qa6 33.Ne5 Bg7 34.Qf4 Bxe5 35.Qxe5 Qc6 36.Qd4 Qb5 37.Qe4 Kg7 38.g4 Kg8
 42/66+	27:00	11 672 255 784	7 204 064	+0,29	11. ... Bd6 12.e4
 42/71+	27:09	11 740 183 040	7 204 966	+0,40	11. ... Bd6 12.e4
 42/71	27:22	11 835 737 644	7 205 064	+0,48	11. ... Bd6 12.e4 Nxe4 13.Nxe4 dxe4 14.Bxe4 Nf6 15.Bg5 h6 16.Bxf6 Qxf6 17.Qe2 c5 18.dxc5 Bxc5 19.b4 Be7 20.c5 a5 21.Rac1 axb4 22.axb4 Qf4 23.Rfe1 Qc7 24.Ne5 Bf6 25.f4 Ra4 26.Qb5 Ra2 27.Rcd1 g6 28.Qc4 Ra8 29.Rd4 Bxe5 30.fxe5 Rxd4 31.Qxd4 Bd7 32.Rd1 Bc6 33.Bf3 Kg7 34.Qf4 Bxf3 35.gxf3 Ra2


Stockfish_19081422_x64_modern:
...
 39/67	05:47	2 417 391 990	6 947 946	-0,38	11. ... Bxa3 12.e4 dxe4 13.Nxe4 Nxe4 14.Bxe4 Bb4 15.Bxb4 Qxb4 16.Re1 Nf6 17.c5 Nxe4 18.Rxe4 e5 19.Rxe5 Be6 20.Re3 b5 21.cxb6 Qxb6 22.Rc1 h6 23.h3 Rd6 24.Rd3 Rad8 25.Qd2 Qb5 26.Qe3 Bd5 27.Ne5 f6 28.Nc4 R6d7 29.Rd2 Qb4 30.Qc3 Rb7 31.Na5 Qxc3 32.Rxc3 Rb6
 40/57-	06:02	2 520 450 572	6 960 686	-0,48	11. ... Bxa3
 40/58-	06:34	2 756 111 333	6 991 994	-0,59	11. ... Bxa3
 40/63+	09:39	4 064 705 273	7 009 115	+0,07	11. ... Bxa3 12.Rxa3
 40/63+	10:58	4 602 992 246	6 992 007	-0,05	11. ... Bxa3 12.Rxa3
 40/63	14:04	5 918 564 425	7 004 674	 0,00	11. ... Bd6 12.e4 dxe4 13.Nxe4 Nxe4 14.Bxe4 Nf6 15.Bg5 h6 16.Bxf6 Qxf6 17.Qe2 c5 18.dxc5 Bxc5 19.b4 Bf8 20.Rad1 Rxd1 21.Rxd1 a5 22.c5 axb4 23.axb4 Qc3 24.Qb5 Ra1 25.Rxa1 Qxa1+ 26.Qf1 Qc3 27.Qe1 Qc4 28.Ne5 Qd4 29.Nf3
 41/53+	14:38	6 149 111 373	6 995 846	+0,10	11. ... Bd6 12.e4

zullil
Posts: 5555
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Re: Testposition for participation on the wccc 2017.

Post by zullil » Mon Aug 19, 2019 10:03 pm

Thomas Lagershausen wrote:
Sun Jun 11, 2017 1:58 pm
I have a recommendation for the ICGA.

Please take this position of yesterdays game of Aronian against Carlsen to make sure that the participating chesssoftware is at toplevel in the developments of computerchessprogramming.

[D]r1br2k1/1p1nqppp/p1p1pn2/3p4/1bPP4/PPN1PN2/2BB1PPP/R2Q1RK1 b - - 0 11 avoiding 11...Bxa3?

The correct move 11...Bd6 ! should be found under 3 minutes of search.

Thx for your attention.
Here's the game. Note that, like the post quoted above, it's from 2017.


Dann Corbit
Posts: 9895
Joined: Wed Mar 08, 2006 7:57 pm
Location: Redmond, WA USA
Contact:

Re: Testposition for participation on the wccc 2017.

Post by Dann Corbit » Mon Aug 19, 2019 10:45 pm

Crystal sparkles:

Code: Select all

Searching: r1br2k1/1p1nqppp/p1p1pn2/3p4/1bPP4/PPN1PN2/2BB1PPP/R2Q1RK1 b - - 0 1
infinite: 0 time: 0 increment: 0 moves to go: 0

 1   -0.31   00:00    5548  Bxa3 
 2   -0.53   00:00   35686  Bxa3 e4 
 3   -0.62   00:00   66264  Bxa3 e4 Nxe4 
 4   -0.23   00:00  145695  Bxa3 Ne2 Bb4 Bxb4 
 5   -0.18   00:00  188289  Bxa3 Re1 Bb4 e4 Bxc3 
 6   +0.04   00:00  212966  Bxa3 Qe1 Bb4 Nxd5 Nxd5 cxd5 
 7   +0.19   00:00  235622  Bxa3 c5 Bb4 Ne2 Bxd2 Qxd2 Ne4 Qb4 
 8   -0.44   00:00  325665  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 Bd3 
 9   -0.17   00:00  404714  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 Bc2 Qe7 
10   -0.02   00:00  504946  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Nf6 Ba5 Rd7 Bc2 Bb2 Ra2 Bxd4 Nxd4 
11   -0.01   00:00  574014  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Nf6 Ba5 Rd7 Bb1 Bc5 Qc2 Bxd4 Nxd4 Rxd4 Bc3 e5 Bxd4 exd4 
12   -0.08   00:00  640427  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Nf6 Ba5 Rd7 Qe2 Nxe4 Qxe4 Bd6 Rfd1 c5 Ne5 f5 Qe2 Bxe5 Qxe5 cxd4 
13   -0.06   00:00  965871  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 Bc2 g6 Qc1 b5 Re1 Bb7 c5 
14   +0.13   00:00   1290K  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 Qe2 Nf6 Bc2 b6 Qe3 Bb7 Ne5 c5 dxc5 Qxc5 
15   +0.20   00:00   2035K  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 Qc1 Nf6 Bc2 b6 Qe3 Bb7 Ne5 c5 Rfd1 Rxd4 Rxd4 cxd4 Qxd4 Qc5 
16   +0.02   00:01   3678K  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 Re1 Qe7 Qd3 Nf6 c5 Nxe4 Qxe4 Qf6 Ne5 h6 Nf3 Bd7 Qe3 Qe7 Ne5 
17   -0.01   00:01   5454K  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 Re1 Qe7 Qc2 Nf6 c5 Nxe4 Qxe4 f6 Nd2 e5 Nf3 Be6 dxe5 Bd5 Qh4 Re8 exf6 Qxf6 Qxf6 gxf6 Nd4 Kg7 Nf5+ Kg6 Rxe8 Rxe8 Nd6 
18   +0.10   00:01   5770K  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 Re1 Qe7 Qc2 Nf6 c5 Nxe4 Rxe4 f6 Rh4 h6 Qg6 Qf7 Qg3 
19   +0.13   00:01   9266K  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 Re1 Qe7 Qd3 Nf6 c5 Qd7 Rad1 Nxe4 Rxe4 f6 Rde1 h6 Qc3 Qd5 R4e2 Bd7 Qc2 a5 
20   +0.00   00:02  13087K  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 c5 Nxc5 Bxh7+ Kxh7 Ne5 Nxb3 Qh5+ Kg8 Qxf7+ Kh7 Qh5+ Kg8 
21   +0.00   00:02  15452K  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 Re1 Nf6 c5 e5 Ra4 Qc3 Rc4 Qa5 Ra4 
22   +0.00   00:03  19472K  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 Re1 Nf6 c5 e5 Ra4 Qc3 Rc4 Qa5 Ra4 
23   +0.00   00:03  20960K  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 Re1 Nf6 c5 e5 Ra4 Qc3 Rc4 Qa5 Ra4 
24   +0.00   00:04  23606K  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 Re1 Nf6 c5 e5 Ra4 Qc3 Rc4 Qa5 Ra4 
25   +0.00   00:05  32790K  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 Re1 Nf6 c5 e5 Ra4 Qc3 Rc4 Qa5 Ra4 
26   +0.00   00:06  37057K  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 Re1 Nf6 c5 e5 Ra4 Qc3 Rc4 Qa5 Ra4 
27   +0.00   00:09  58438K  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 Re1 Nf6 c5 e5 Ra4 Qc3 Rc4 Qa5 Ra4 
28   +0.00   00:12  78500K  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 Bxb4 Qxb4 Re1 Nf6 c5 e5 Ra4 Qc3 Rc4 Qa5 Ra4 
29   +0.00   00:17 108952K  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 c5 Bxd2 Qxd2 Nf6 Bd3 b5 Rfe1 Nd5 g3 f6 Be4 Qf7 h4 Qh5 b4 Bb7 Kg2 Bc8 
30   +0.11   00:34 218874K  Bxa3 e4 dxe4 Nxe4 Nxe4 Bxe4 Bb4 c5 Bxd2 Qxd2 Nf6 Bd3 Bd7 Ne5 Be8 Nc4 Nd5 Rae1 Nc7 Nd6 Rxd6 cxd6 Qxd6 Qc2 h6 Qc5 Nb5 Bxb5 Qxc5 dxc5 cxb5 b4 a5 bxa5 Rxa5 f3 b4 Rb1 Rb5 Rb2 Bc6 Kf2 b3 Ke3 Bd5 
31   -0.42   01:46 694756K  Bd6 e4 dxe4 Nxe4 Nxe4 Bxe4 Nf6 Bg5 h6 Bxf6 Qxf6 Qe2 c5 dxc5 Bxc5 b4 Bf8 c5 a5 Rac1 axb4 axb4 g6 Qb5 Qf4 Rfe1 Qc7 Rcd1 Bg7 g3 Rxd1 Qe8+ Bf8 Rxd1 Kg7 
32   -0.19   02:16 890324K  Bd6 e4 dxe4 Nxe4 Nxe4 Bxe4 Nf6 Bg5 h6 Bxf6 Qxf6 Qe2 c5 dxc5 Bxc5 b4 Bf8 c5 a5 Rac1 axb4 axb4 g6 Qb5 Qf4 Rfe1 Qc7 Red1 Bg7 h3 Rb8 Rxd8+ Qxd8 Qc4 Bd7 b5 Be8 c6 bxc6 Bxc6 Qe7 g3 e5 Qc5 Qxc5 Rxc5 e4 Ne5 Bf8 Rc4 
33   -0.35   03:59   1550M  Bd6 e4 dxe4 Nxe4 Nxe4 Bxe4 Nf6 Bg5 h6 Bxf6 Qxf6 Qe2 c5 dxc5 Bxc5 b4 Bf8 c5 a5 Rac1 axb4 axb4 g6 h3 Bg7 b5 Qe7 c6 bxc6 Rfd1 Rb8 Rxd8+ Qxd8 Bxc6 Bb7 g3 Qc7 Kg2 Bxc6 bxc6 h5 Rc5 Rb2 Qf1 Rb6 Qc4 Rb2 
34   -0.38   04:54   1910M  Bd6 e4 dxe4 Nxe4 Nxe4 Bxe4 Nf6 Bg5 h6 Bxf6 gxf6 Qc1 Qf8 c5 Bc7 Rd1 Qg7 Qc2 f5 Bd3 f4 Bc4 b5 Bf1 a5 b4 a4 Re1 Bb7 g3 Kh8 Rac1 fxg3 hxg3 Bf4 Ra1 Bc7 Qe2 Rg8 
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.

zullil
Posts: 5555
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Re: Testposition for participation on the wccc 2017.

Post by zullil » Mon Aug 19, 2019 11:00 pm

Vinvin wrote:
Mon Aug 19, 2019 7:24 pm
SF regressed a lot on this one (avoiding Bxa3) : about 1 minute 2 years ago but more than 15 minutes now (6*4GHz).
SF has trouble to consider 12.Rxa3! on 11...Bxa3?

[d]r1br2k1/1p1nqppp/p1p1pn2/3p4/1bPP4/PPN1PN2/2BB1PPP/R2Q1RK1 b - - 0 11
Lc0 (network 320x24.J13-swa-410000) with 100M nodes:

0819 18:41:20.274396 140214599579392 ../../src/mcts/search.cc:384] Stopped search: Reached visits limit: 100000056>=100000000

info depth 35 seldepth 84 time 5082974 nodes 100000056 score cp -44 hashfull 384 nps 19673 tbhits 432 multipv 1 pv b4d6 e3e4 d5e4 c3e4 f6e4 c2e4 d7f6 d2g5 c6c5 d1c2 h7h6 d4c5 d6c5 g5f6 g7f6 b3b4 c5d6 c4c5 d6c7 f1e1 e7f8 f3h4 a8b8 e4f3 c8d7 a1d1 f6f5 f3b7 b8b7 c5c6 d7c6 c2c6 d8d1 e1d1 f8b8 g2g3 c7b6 d1d6 a6a5 h4f3 a5b4 a3b4 b6a7 d6d8 b8d8 c6b7 a7b6 g1g2 d8d6 b7c8 g8h7 b4b5 h7g7 c8c3 g7g8 c3c1 g8g7 c1c6 d6c6 b5c6 g7f6 f3d4 f6e7 d4b5 b6c5 f2f3 e7d8 g2h3 c5e7 g3g4 f5g4 h3g4 e7g5 f3f4 g5e7 g4h5 e7f8

info depth 35 seldepth 84 time 5082974 nodes 100000056 score cp -45 hashfull 384 nps 19673 tbhits 432 multipv 2 pv b4a3 a1a3 e7a3 c4c5 b7b5 b3b4 f6e4 c3e4 d5e4 c2e4 a3b2 e4c6 a8a7 h2h4 d7b8 c6e4 f7f5 e4c2 b8c6 c2b3 h7h6 d1b1 b2b1 f1b1 g7g6 g1h2 g8g7 b1g1 g7h7 g1c1 h7g8 c1e1 g8g7 e3e4 f5e4 e1e4 a6a5 b4a5 c6a5 b3e6 c8e6 e4e6 a5c4 d2f4 b5b4 f3e5 d8d4 e6g6 g7h7 g6h6 h7g8 h6g6 g8h7

Is 11...Bxa3 actually a blunder? Carlsen played it and eventually lost, but the game is filled with bad blunders.

[EDIT] With Black's queen trapped in the corner, it seems that Bxa3 has to be bad ,,,

Spliffjiffer
Posts: 182
Joined: Thu Aug 02, 2012 5:48 pm
Location: Germany

Re: Testposition for participation on the wccc 2017.

Post by Spliffjiffer » Tue Aug 20, 2019 9:57 am

when i formerly analysed this position my conclusion was that Bxa3 ?! was not a loosing move...just an inferior move compared to Bd6 but i cant remember anymore how seriously my investigation was at this time...it was quite serious but not incredibly deep i think...anyways...my conclusion was : probably draw with Bxa3 !??
Wahrheiten sind Illusionen von denen wir aber vergessen haben dass sie welche sind.

Vinvin
Posts: 4334
Joined: Thu Mar 09, 2006 8:40 am
Full name: Vincent Lejeune

Re: Testposition for participation on the wccc 2017.

Post by Vinvin » Tue Aug 20, 2019 1:19 pm

Spliffjiffer wrote:
Tue Aug 20, 2019 9:57 am
when i formerly analysed this position my conclusion was that Bxa3 ?! was not a loosing move...just an inferior move compared to Bd6 but i cant remember anymore how seriously my investigation was at this time...it was quite serious but not incredibly deep i think...anyways...my conclusion was : probably draw with Bxa3 !??
The difference between the 2 lines is about 0.40 (0.75 to 0.31)
After ...Bxa3 Rxa3 Qxa3 c5 : 41/67 07:04 2.961.410k 6.979k +0,75 13. ... b6 14.Nb1 Qa2 15.Qc1 bxc5 16.Nc3 Qa5 17.Nxd5 ...
After ...Bd6 : 38/59+ 04:01 1.500.941k 6.216k +0,31 12.e4

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