Find the break

Discussion of anything and everything relating to chess playing software and machines.

Moderators: hgm, Rebel, chrisw

beram
Posts: 1187
Joined: Wed Jan 06, 2010 3:11 pm

Find the break

Post by beram »

How long for your engines and system to find the winning break?

[d] r5rk/2p1p2p/p3q1pb/NpBbPp2/3P1P1P/2P5/P2Q2P1/R3R1K1 b - - 0 25
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Jouni
Posts: 3283
Joined: Wed Mar 08, 2006 8:15 pm

Re: Find the break

Post by Jouni »

Analysis by Houdini 5.01 x64-pext Tac:

25...g5 26.hxg5 Bxg5 27.fxg5 f4 28.Qxf4 Raf8 29.Qh2 Rxg5 30.Re2 Qg4 31.Bxe7 Rh5 32.Qxh5 Qxh5 33.Rb2
-/+ (-0.72) Depth: 13/32 00:00:00 6744kN

Please something more difficult :D .
Jouni
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beram
Posts: 1187
Joined: Wed Jan 06, 2010 3:11 pm

Re: Find the break

Post by beram »

Jouni wrote:Analysis by Houdini 5.01 x64-pext Tac:

25...g5 26.hxg5 Bxg5 27.fxg5 f4 28.Qxf4 Raf8 29.Qh2 Rxg5 30.Re2 Qg4 31.Bxe7 Rh5 32.Qxh5 Qxh5 33.Rb2
-/+ (-0.72) Depth: 13/32 00:00:00 6744kN

Please something more difficult :D .
Dont use tactical settings but plain engine
For instance Houdini standard, Stockfish or Komodo
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Find the break

Post by Vinvin »

beram wrote:How long for your engines and system to find the winning break?

[d] r5rk/2p1p2p/p3q1pb/NpBbPp2/3P1P1P/2P5/P2Q2P1/R3R1K1 b - - 0 25
When g5 is played on the board, SF understand very fast that black is better but SF takes a long time to find 25...g5! :?
5 runs on an i7-6*4GHz : 35s, 1m31s, 1m4s, 30s and 26s.

Code: Select all

Stockfish_170428_x64_modern:
Found 510 tablebases
...
 29/38	00:23	 226 642k	9 595k	+0,10	25. ... Qf7 26.Re2 Rgd8 27.Qe3 Kg8 28.Bb4 e6 29.Rd2 Qe8 30.Qf2 Rd7 31.Rad1 Qd8 32.g3 Be4 33.Qe3 Bg7 34.Nb3 Bd5 35.Ba5 Bf8 36.Re1 Qe8 37.Bb4 Bxb3 38.axb3 Bxb4 39.cxb4 a5 40.bxa5
 30/40-	00:35	 340 613k	9 583k	+0,02	25. ... g5
 30/40-	00:36	 351 239k	9 580k	-0,04	25. ... g5
 30/54-	00:48	 466 156k	9 536k	-2,27	25. ... g5
 30/58	00:53	 513 470k	9 511k	-2,48	25. ... g5 26.hxg5 Bxg5 27.fxg5 f4 28.Qxf4 Raf8 29.Qh2 Rxg5 30.Re2 Rff5 31.Rf1 Rh5 32.Rxf5 Rxh2 33.Kxh2 Qxf5 34.Re3 Qe6 35.Nb3 Kg8 36.Rh3 Qf7 37.Nc1 Qf4+ 38.Rg3+ Kf8 39.Ne2 Qf2 40.c4 Qxe2 41.cxd5 Qxa2 42.d6 exd6 43.exd6 cxd6


Stockfish_170428_x64_modern:
Found 510 tablebases
...
 32/51	01:10	 690 458k	9 790k	-0,08	25. ... Bxf4 26.Qxf4 g5 27.hxg5 h6 28.c4 bxc4 29.Bxe7 Qxe7 30.e6 c6 31.Qe5+ Kh7 32.Qxf5+ Rg6 33.Re2 c3 34.Rb1 Rf8 35.Rb7 Qxb7 36.Qxg6+ Kxg6 37.Nxb7 Re8 38.gxh6 Rxe6 39.Rc2 Kxh6 40.Rxc3 Re2 41.Nd8 Rxg2+ 42.Kf1 Rxa2 43.Nxc6 Kg7 44.Ke1 Rb2 45.Ne7
 33/55-	01:31	 898 685k	9 830k	-0,15	25. ... g5
 33/55-	01:31	 903 829k	9 833k	-0,22	25. ... g5
 33/67-	02:23	 1 387 339k	9 643k	-2,45	25. ... g5
 33/67	02:47	 1 631 118k	9 751k	-2,56	25. ... g5 26.hxg5 Bxg5 27.fxg5 f4 28.Qxf4 Raf8 29.Qh2 Rxg5 30.Re2 Rff5 31.Rf1 Rh5 32.Rxf5 Rxh2 33.Kxh2 Qxf5 34.Re3 Kg7 35.Bxe7 Qf2 36.Rg3+ Kf7 37.Bd8 Ke8 38.Bf6 Qxa2 39.e6 Bxe6 40.Nb7 a5 41.Nc5 Bf5 42.Na6 c6 43.Re3+ Kf7 44.Be5 Qd2 45.Rf3 Kg6 46.Rg3+ Kh5 47.Rf3 Be4 48.Bf4 Qc2 49.Rg3 a4
 34/67-	02:52	 1 679 403k	9 757k	-2,64	25. ... g5
 34/67-	02:53	 1 691 513k	9 767k	-2,71	25. ... g5
 34/67-	03:05	 1 827 373k	9 831k	-3,18	25. ... g5
 34/70	03:14	 1 923 454k	9 909k	-3,10	25. ... g5 26.hxg5 Bxg5 27.fxg5 f4 28.Qxf4 Raf8 29.Qh2 Rxg5 30.Re2 Rff5 31.Rf1 Rh5 32.Rxf5 Rxh2 33.Rg5 Rh1+ 34.Kxh1 Qh6+ 35.Kg1 Qxg5 36.Nb3 Bc4 37.Rf2 Qe3 38.Nd2 Qe1+ 39.Nf1 Qxc3 40.Kh2 Qe1 41.Kg1 Qa1 42.e6 Kg8 43.Bxe7 Bxe6 44.d5 Bxd5 45.Rf8+ Kg7 46.Bf6+ Qxf6 47.Rxf6 Kxf6 48.a3 a5 49.Ne3 Be6 50.Kf2


Stockfish_170428_x64_modern:
Found 510 tablebases
...
 29/42	00:20	 208 525k	10 229k	+0,18	25. ... Qf7 26.Bb4 e6 27.Rf1 Rgd8 28.Nb3 Kg8 29.Qf2 Bg7 30.Rfb1 Be4 31.Rb2 Bc6 32.g3 Qd7 33.Na5 Bd5 34.Qe3 Bf8 35.Bxf8 Rxf8 36.Rd1 Rab8 37.Rh2 b4 38.Rc1 Qb5 39.c4 Qxa5 40.cxd5 Qxd5
 30/42-	00:28	 295 144k	10 344k	+0,10	25. ... Qf7
 30/42	00:40	 417 626k	10 415k	+0,09	25. ... Qf7 26.Bb4 Rgd8 27.Qf2 e6 28.Re2 Bf8 29.Rc2 Bg7 30.Qg3 Kg8 31.Rd1 Bf8 32.Rcd2 Bg7 33.Rb2 Rd7 34.Qf2 Bf8 35.g3 Rdd8 36.Rdd2 Be7 37.Nb3 Bxb4 38.cxb4 Bxb3 39.Rxb3 a5 40.Qf3
 31/47-	01:04	 667 192k	10 391k	+0,02	25. ... g5
 31/47-	01:04	 668 751k	10 390k	-0,04	25. ... g5
 31/60-	01:14	 776 040k	10 478k	-2,28	25. ... g5
 31/62	01:23	 872 881k	10 415k	-2,99	25. ... g5 26.fxg5 Bxg5 27.hxg5 f4 28.Qxf4 Raf8 29.Qh2 Rxg5 30.Re2 Rff5 31.Rf1 Rh5 32.Rxf5 Rxh2 33.Kxh2 Qxf5 34.Re3 Qf7 35.Nb3 Kg8 36.Nc1 Qf4+ 37.Rg3+ Kf8 38.Nd3 Qh4+ 39.Rh3 Qg5 40.Rg3 Qd2 41.Bb4 Bxg2 42.Rxg2 Qxd3 43.Rg3 Qe2+ 44.Rg2 Qe3 45.Rg3 Qf4 46.Kh3 Qh6+ 47.Kg4 Qe6+ 48.Kh5 Qxa2
 32/62-	01:32	 952 090k	10 341k	-3,06	25. ... g5


Stockfish_170428_x64_modern:
Found 510 tablebases...
 28/52	00:24	 233 472k	9 377k	-0,07	25. ... Bxf4 26.Qxf4 g5 27.hxg5 h6 28.c4 bxc4 29.Bxe7 Qxe7 30.e6 c6 31.Qe5+ Kh7 32.Qxf5+ Rg6 33.Re5 Kg7 34.Rf1 Rxg5 35.Qf7+ Qxf7 36.Rxg5+ hxg5 37.Rxf7+ Kh6 38.Rc7 c3 39.Nxc6 Bxe6 40.Ne7 Bxa2 41.Rxc3 a5 42.d5 a4 43.Rc5 g4 44.Kf2 Kg7 45.d6 Kf7 46.Kg3
 29/53-	00:30	 287 218k	9 418k	-0,14	25. ... g5
 29/53-	00:31	 295 679k	9 426k	-0,21	25. ... g5
 29/53-	00:36	 348 479k	9 477k	-0,97	25. ... g5
 29/53+	00:39	 379 082k	9 489k	-0,74	25. ... g5 26.fxg5
 29/53-	00:41	 394 170k	9 498k	-1,04	25. ... g5
 29/53-	00:47	 446 865k	9 469k	-1,66	25. ... g5
 29/53	00:51	 491 956k	9 509k	-1,95	25. ... g5 26.fxg5 Bxg5 27.hxg5 f4 28.Qxf4 Raf8 29.Qh2 Rxg5 30.Re2 Qg4 31.Bxe7 Rh5 32.Qxh5 Qxh5 33.Rae1 Rf4 34.e6 Qg4 35.Bf6+ Rxf6 36.e7 Bf7 37.e8Q+ Bxe8 38.Rxe8+ Kg7 39.R8e7+ Kh6 40.R1e2 Qf4 41.R2e3 Rf7 42.R3e6+ Kh5 43.Re5+ Kg4 44.Rxf7 Qxf7 45.a3 Qf4


Stockfish_170428_x64_modern:
Found 510 tablebases
...
 28/53	00:20	 178 048k	8 896k	-0,06	25. ... Bxf4 26.Qxf4 g5 27.hxg5 h6 28.c4 bxc4 29.Bxe7 Qxe7 30.e6 c6 31.Qe5+ Qg7 32.e7 Rae8 33.Nb7 Be4 34.Qxg7+ Rxg7 35.Nd6 Rexe7 36.Nxe4 fxe4 37.gxh6 Rg3 38.Rac1 c3 39.Kf2 Rd3 40.Re3 Rd2+ 41.Ke1 Rxg2 42.Rcxc3 Re6 43.Re2 Rg4 44.Ra3 Rxh6 45.Rxa6 Rd6 46.Rb6 Kh7
 29/53-	00:26	 235 791k	8 932k	-0,13	25. ... g5
 29/53-	00:27	 244 313k	8 938k	-0,20	25. ... g5
 29/53-	00:38	 344 495k	9 046k	-1,81	25. ... g5
 29/60	00:45	 418 303k	9 109k	-1,99	25. ... g5 26.hxg5 Bxg5 27.fxg5 f4 28.Re2 Rxg5 29.Qxf4 Rag8 30.Bxe7 Rxg2+ 31.Rxg2 Rxg2+ 32.Kf1 Qxe7 33.Re1 Qg7 34.Re2 Rg1+ 35.Kf2 Kg8 36.e6 Rh1 37.Qf7+ Qxf7+ 38.exf7+ Kxf7 39.Re5 c6 40.Nb7 Kf6 41.Nc5 Rh2+ 42.Ke3 Rc2 43.Nd7+ Kg6 44.c4 Rxc4 45.Nb6 Rc3+ 46.Kd2 Ra3 47.Nxd5 Rxa2+ 48.Kc3 cxd5 49.Rxd5 Ra3+ 50.Kb4 Ra4+ 51.Kc5
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User avatar
Eelco de Groot
Posts: 4563
Joined: Sun Mar 12, 2006 2:40 am
Full name:   

Re: Find the break

Post by Eelco de Groot »

5 minutes on my system, using HT. Score is climbing fast when the move is found.


r5rk/2p1p2p/p3q1pb/NpBbPp2/3P1P1P/2P5/P2Q2P1/R3R1K1 b - -

Engine: Rainbow Serpent 20170105 HT (i7 6700, 3 hyperthreads, 512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott

21/28 0:01 +0.20 1...Qd7 2.Qf2 e6 3.Bb4 Bf8 4.Re3 Be7
5.Bxe7 Qxe7 6.Nb3 a5 7.Nc5 c6 8.Rh3 h6
9.Rb1 Rgd8 10.a3 a4 11.Qe3 Kh7
12.Rb2 Rg8 13.Qg3 Qc7 (14.969.315) 9620

22/30 0:02 +0.18 1...Qd7 2.Qf2 e6 3.Re3 Bf8 4.Bb4 Be7
5.Bxe7 Qxe7 6.Nb3 a5 7.Nc5 c6 8.Rb1 a4
9.Rb2 h6 10.a3 Kh7 11.Rh3 Rgd8
12.Qe3 Qf7 13.Qg3 (19.495.543) 9622

23/42 0:05 +0.18 1...Qd7 2.Qf2 e6 3.Re3 Bf8 4.Bb4 Be7
5.Bxe7 Qxe7 6.Nb3 Rgd8 7.Nc5 a5
8.Rh3 c6 9.Qg3 a4 10.a3 Rg8 11.Rb1 h6
12.Qe3 Kh7 13.Rb2 Rgd8 14.Qf2 Rg8 (48.018.583) 9291
.
.
.
30/53 3:47 0.00 1...Qd7 2.Re2 e6 3.Qe3 Bf8 4.Bxf8 Rgxf8
5.Nb3 Bxb3 6.axb3 a5 7.Kh2 a4 8.Rea2 Qc6
9.c4 bxc4 10.Rxa4 cxb3 11.Rxa8 Rxa8
12.Rxa8+ Qxa8 13.Qxb3 Qd8 14.g3 Qxd4 (1.996.039.140) 8758

31/55 5:04 -0.08++ 1...g5 (2.671.810.575) 8780

31/55 5:15 -0.16++ 1...g5 (2.774.303.545) 8794

31/55 5:25 -0.28++ 1...g5 (2.864.457.108) 8792

31/55 5:51 -0.45++ 1...g5 (3.095.285.443) 8796

31/60 7:38 -0.68++ 1...g5 (4.098.356.167) 8945

31/60 8:10 -0.98++ 1...g5 (4.382.688.154) 8940

31/60 8:30 -1.39++ 1...g5 (4.550.306.147) 8921

31/60 8:56 -1.34 1...g5 2.hxg5 Bxg5 3.fxg5 f4 4.Qxf4 Raf8
5.Qh2 Rxg5 6.Re2 Qg4 7.Bxe7 Rh5
8.Qxh5 Qxh5 9.Rae1 Rf4 10.e6 Qg4
11.Bh4 Qxh4 12.e7 Bf7 13.e8Q+ Bxe8
14.Rxe8+ Kg7 (4.803.820.955) 8948

32/60 9:11 -1.42++ 1...g5 (4.940.166.813) 8957

32/60 9:25 -1.50++ 1...g5 (5.072.226.239) 8976

32/60 9:34 -1.62++ 1...g5 (5.161.501.693) 8976

32/60 9:47 -1.79++ 1...g5 (5.276.817.723) 8981

32/60 10:53 -2.02++ 1...g5 (5.907.758.601) 9034

32/60 11:25 -2.20 1...g5 2.hxg5 Bxg5 3.fxg5 f4 4.Re2 Rxg5
5.Qxf4 Rag8 6.Bxe7 Qxe7 7.Qf6+ Qxf6
8.exf6 Rxg2+ 9.Rxg2 Rxg2+ 10.Kf1 Rh2
11.Re1 Rh1+ 12.Kf2 Rxe1 13.Kxe1 Kg8
14.Nb3 Kf7 (6.212.858.078) 9063

33/60 12:13 -2.28++ 1...g5 (6.655.616.731) 9072

33/60 12:31 -2.36++ 1...g5 (6.810.870.144) 9064

33/60 13:03 -2.48++ 1...g5 (7.084.742.124) 9047

33/60 14:04 -2.65++ 1...g5 (7.617.581.267) 9022

33/60 14:58 -2.88++ 1...g5 (8.114.276.763) 9030

33/60 17:18 -3.19++ 1...g5 (9.505.763.114) 9153

33/64 18:03 -3.24 1...g5 2.hxg5 Bxg5 3.fxg5 f4 4.Qxf4 Raf8
5.Qh2 Rxg5 6.Re2 Rff5 7.Bxe7 Qxe7
8.Rf1 Rxf1+ 9.Kxf1 Rf5+ 10.Rf2 Qg5
11.Rxf5 Qxf5+ 12.Ke2 Qc2+ 13.Kf1 Qb1+
14.Ke2 Qxa2+ (9.925.439.041) 9161

34/64 18:46 -3.16-- 1...g5 2.hxg5 (10.362.310.605) 9199

34/64 19:28 -3.24++ 1...g5 (10.772.629.704) 9216

34/74 20:45 -3.25 1...g5 2.hxg5 Bxg5 3.fxg5 f4 4.Qxf4 Raf8
5.Qh2 Rxg5 6.Re2 Rff5 7.Rf1 Rh5
8.Rxf5 Rxh2 9.Rg5 Rh4 10.Nb3 Bc4
11.Re1 Rh1+ 12.Kxh1 Qh6+ 13.Rh5 Qxh5+
14.Kg1 Qg5 (11.526.334.755) 9257

35/74 22:28 -3.33++ 1...g5 (12.523.906.914) 9290

35/74 23:32 -3.41++ 1...g5 (13.133.054.145) 9299

35/74 25:34 -3.53++ 1...g5 (14.305.364.571) 9323

35/77 31:03 -3.70++ 1...g5 (17.561.032.146) 9425

35/77 33:22 -3.56-- 1...g5 2.hxg5 (18.977.181.732) 9477

35/77 33:52 -3.64 1...g5 2.hxg5 Bxg5 3.fxg5 f4 4.Qxf4 Raf8
5.Qh2 Rxg5 6.Re2 Rff5 7.Rf1 Rh5
8.Rxf5 Rxh2 9.Rg5 Rh4 10.Nb3 Bc4
11.Re1 Rh1+ 12.Kxh1 Qh6+ 13.Rh5 Qxh5+
14.Kg1 Qg5 (19.270.489.581) 9482
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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david
Posts: 20
Joined: Sat Jan 16, 2016 7:25 pm

Re: Find the break

Post by david »

houdini 5 finds ...g5 instantly, at depth 21. at depth 27, the score is -2.4
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peter
Posts: 3186
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Find the break

Post by peter »

Hi Bram!
beram wrote: Dont use tactical settings but plain engine
For instance Houdini standard,
r5rk/2p1p2p/p3q1pb/NpBbPp2/3P1P1P/2P5/P2Q2P1/R3R1K1 b - - 0 1

Analysis by Houdini 5.01 Pro x64-popc:

25...Tgd8 26.Te2 Tab8 27.Tc1 Lg7 28.Tce1 Df7 29.Te3
=/+ (-0.33) Tiefe: 8/15 00:00:00 202kN
...
25...Taf8 26.Te2 Tf7 27.Tf1 Dd7 28.Te3 e6 29.Th3 Dd8 30.Tc1 Le4 31.Sb3 Da8 32.Lb4 Td8 33.Df2 Ld5 34.Sa5 Tfd7 35.Te1 Tf7
= (0.00 --) Tiefe: 21/42 00:00:40 719MN
25...g5
= (-0.30 ++) Tiefe: 21/42 00:00:40 719MN
...
25...g5 26.fxg5 Lxg5 27.hxg5 f4 28.Te2 Txg5 29.Dxf4 Tag8 30.Lxe7 Dxe7 31.Df6+ Dxf6 32.exf6 Txg2+ 33.Txg2 Txg2+ 34.Kf1 Kg8 35.Te1 Txa2 36.Te5 Lg2+ 37.Kg1 Lf3 38.Sb3 Kf7 39.Te7+ Kxf6
-+ (-1.65) Tiefe: 21/50 00:00:47 905MN
...
25...g5 26.fxg5 Lxg5 27.hxg5 f4 28.Te2 Txg5 29.Dxf4 Tag8 30.Lxe7 Dxe7 31.Df6+ Dxf6 32.exf6 Txg2+ 33.Txg2 Txg2+ 34.Kf1 Th2 35.Te1 Th1+ 36.Kf2 Txe1 37.Kxe1 Kg8 38.Ke2 Kf7 39.Kd3 h5 40.c4 bxc4+
-+ (-1.82) Tiefe: 22/55 00:00:55 1103MN
...
25...g5 26.fxg5 Lxg5 27.hxg5 f4 28.Te2 Txg5 29.Dxf4 Tag8 30.Lxe7 Dxe7 31.Df6+ Dxf6 32.exf6 Txg2+ 33.Txg2 Txg2+ 34.Kf1 Th2 35.Te1 Th1+ 36.Kf2 Txe1 37.Kxe1 Kg8 38.c4 bxc4 39.Kd2 Kf7 40.Kc3 h5 41.Kb4 c3
-+ (-2.17) Tiefe: 24/57 00:01:21 1800MN
...
25...g5 26.hxg5 Lxg5 27.fxg5 f4 28.Te2 Txg5 29.Dxf4 Tag8 30.Lxe7 Txg2+ 31.Txg2 Txg2+ 32.Kf1 Dxe7 33.Te1 Dg7 34.Df6 Tg1+ 35.Kf2 Dxf6+ 36.exf6 Txe1 37.Kxe1 Kg8 38.Kf2 Kf7 39.Kg3 Kxf6 40.Kg4 Lxa2 41.Kh5 Ke6 42.Kh6 Lb1 43.Kg7 Kd5 44.Kf6 Ke4 45.Sb7
-+ (-2.38) Tiefe: 25/62 00:02:01 2850MN
...
25...g5 26.hxg5 Lxg5 27.fxg5 f4 28.Te2 Txg5 29.Dxf4 Tag8 30.Lxe7 Txg2+ 31.Txg2 Txg2+ 32.Kf1 Dxe7 33.Te1 Dg7 34.Te2 Tg1+ 35.Kf2 Th1 36.Df6 Dxf6+ 37.exf6 Th2+ 38.Ke1 Txe2+ 39.Kxe2 Kg8 40.Ke3 Kf7 41.Kf4 Kxf6 42.Kg4 Lxa2 43.Kh5 Ke6 44.Kh6 Lb1 45.Kg5 Kd5 46.Kf4
-+ (-2.47) Tiefe: 27/68 00:03:00 4399MN
Peter.
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kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Re: Find the break

Post by kgburcham »

[D] r5rk/2p1p2p/p3q1pb/NpBbPp2/3P1P1P/2P5/P2Q2P1/R3R1K1 b - -


Engine: Stockfish 290417 64 BMI2 (8192 MB)
by T. Romstad, M. Costalba, J. Kiiski, G.

29/49 0:15 +0.06++ 1...g5 (248.767.158) 16028
29/49 0:16 0.00++ 1...g5 (258.982.618) 16072
29/49 0:16 -0.11++ 1...g5 (273.705.675) 16129
29/49 0:17 -0.26++ 1...g5 (289.275.274) 16177
29/49 0:18 -0.47++ 1...g5 (302.359.201) 16208
29/49 0:19 -0.75++ 1...g5 (321.053.694) 16272
29/49 0:21 -1.12++ 1...g5 (346.588.743) 16340
29/49 0:24 -1.61++ 1...g5 (403.020.380) 16471
29/56 0:28 -1.86 1...g5 2.fxg5 Bxg5 3.hxg5 f4 4.Qxf4 Raf8 5.Qh2 Rxg5 6.Re2 Qg4 7.Bxe7 Rh5 8.Qxh5 Qxh5 9.Rae1 Rf4 10.e6 Qg6 11.Bg5 Qxg5 12.e7 Bf7 13.e8Q+ Bxe8 14.Rxe8+ Kg7 (477.662.420) 16641
30/56 0:29 -1.79-- 1...g5 2.fxg5 (487.063.319) 16664
30/56 0:30 -1.86++ 1...g5 (505.864.470) 16699
30/63 0:30 -1.79-- 1...g5 2.fxg5 (517.722.943) 16722
30/63 0:31 -1.69 1...g5 2.fxg5 Bxg5 3.hxg5 f4 4.Qxf4 Raf8 5.Qh2 Rxg5 6.Re2 Qg4 7.Bxe7 Rh5 8.Qxh5 Qxh5 9.Rae1 Rf4 10.e6 Qg4 11.Bh4 Qxh4 12.e7 Bf7 13.e8Q+ Bxe8 14.Rxe8+ Kg7 (518.499.316) 16723
31/63 0:32 -1.76++ 1...g5 (541.488.230) 16771
31/63 0:33 -1.83++ 1...g5 (566.133.683) 16821
31/63 0:35 -1.94++ 1...g5 (605.907.824) 16919
31/63 0:37 -2.10++ 1...g5 (631.277.566) 16972
31/63 0:38 -2.31++ 1...g5 (653.783.819) 16991
31/63 0:44 -2.59++ 1...g5 (767.180.897) 17209
31/63 0:46 -2.65 1...g5 2.hxg5 Bxg5 3.fxg5 f4 4.Qxf4 Raf8 5.Qh2 Rxg5 6.Re2 Rff5 7.Rf1 Rh5 8.Rxf5 Rxh2 9.Kxh2 Qxf5 10.Re3 Qf4+ 11.Rg3 Qh6+ 12.Rh3 Qd2 13.Rg3 Qxa2 14.Bxe7 h5 (793.713.959) 17248
32/63 0:47 -2.72++ 1...g5 (828.017.019) 17306
32/63 0:49 -2.80++ 1...g5 (866.647.976) 17374
32/63 0:52 -2.91++ 1...g5 (914.982.071) 17441
32/66 0:54 -2.91 1...g5 (960.780.864) 17501
33/57 0:54 -2.93 1...g5 2.hxg5 Bxg5 3.fxg5 f4 4.Qxf4 Raf8 5.Qh2 Rxg5 6.Re2 Rff5 7.Rf1 Rh5 8.Rxf5 Rxh2 9.Rg5 Rh1+ 10.Kxh1 Qh6+ 11.Kg1 Qxg5 12.Nb3 Bc4 13.Rb2 Qe3+ 14.Kh2 a5 (960.780.864) 17501
no chess program was born totally from one mind. all chess programs have many ideas from many minds.
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peter
Posts: 3186
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Find the break

Post by peter »

r5rk/2p1p2p/p3q1pb/NpBbPp2/3P1P1P/2P5/P2Q2P1/R3R1K1 b - - 0 1

Analysis by McBrain 2.1a 64:

25...Kg7 26.Df2 Tgd8 27.Lb4 Kg8 28.Te3 Le4
= (0.11) Tiefe: 7/7 00:00:00 78kN
...
25...Df7 26.Teb1 e6 27.Tb2 Tgd8 28.Lb4 Kg8 29.g3 Lg7 30.Sb3 De8 31.Dd1 Df7 32.Th2 c6 33.Dd2 Ta7 34.Tc1 a5 35.Sxa5 Tda8 36.c4 Le4 37.a3 Dc7 38.Sb3 bxc4 39.Txc4
= (0.15) Tiefe: 26/34 00:00:26 270MN
25...g5
= (0.08) Tiefe: 27/36 00:00:47 670MN
...
25...g5 26.hxg5 Lxg5 27.fxg5 f4 28.Te2 Txg5 29.Dxf4 Tag8 30.Lxe7 Dxe7 31.Df6+ Dxf6 32.exf6 Txg2+ 33.Txg2 Txg2+ 34.Kf1 Kg8 35.Sb3 Kf7 36.Sc5 a5 37.a4 Th2 38.Ta3 b4 39.cxb4 axb4 40.Te3 Kxf6 41.a5 Ta2 42.a6 Lc4+ 43.Ke1 h5 44.Th3 Kg5 45.Sd3
-+ (-1.62) Tiefe: 27/44 00:01:04 988MN
...
25...g5 26.hxg5 Lxg5 27.fxg5 f4 28.Dxf4 Taf8 29.Dd2 Tf5 30.Te2 Tfxg5 31.Tf1 Txg2+ 32.Txg2 Lxg2 33.Dxg2 Txg2+ 34.Kxg2 Dxa2+ 35.Kg3 Dxa5 36.Lb4 Db6 37.Tf8+ Kg7 38.Lxe7 Dc6 39.Tf3 a5 40.Lf8+ Kg8 41.Kf2 De4 42.Lc5 Dc2+ 43.Kg3 De2 44.Tf5 h5 45.Tf6 De1+ 46.Kf4 h4 47.Kg4 Dg3+ 48.Kf5
-+ (-2.94) Tiefe: 33/76 00:02:15 2451MN
...
25...g5 26.fxg5 f4 27.Dxf4 Lxg5 28.hxg5 Taf8 29.Dh2 Txg5 30.Te2 Tff5 31.Tf1 Th5 32.Txf5 Txh2 33.Tg5 Th1+ 34.Kxh1 Dh6+ 35.Kg1 Dxg5 36.Sb3 Lc4 37.Tf2 De3 38.Sd2 De1+ 39.Sf1 Dxc3 40.Kh2 De1 41.Kg1 Da1 42.e6 Kg8 43.a3 a5 44.Lxe7 Lxe6 45.Lc5 Lc4 46.Tf8+ Kg7 47.Tf3 Kg6 48.Tf2 De1 49.Tf3 Dc1 50.Tg3+ Kf5 51.Tf3+ Ke4 52.Tf8 Lxf1 53.Txf1
-+ (-3.32) Tiefe: 37/76 00:03:48 4517MN
Peter.
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Lyudmil Tsvetkov
Posts: 6052
Joined: Tue Jun 12, 2012 12:41 pm

Re: Find the break

Post by Lyudmil Tsvetkov »

beram wrote:How long for your engines and system to find the winning break?

[d] r5rk/2p1p2p/p3q1pb/NpBbPp2/3P1P1P/2P5/P2Q2P1/R3R1K1 b - - 0 25
Rg7 is much stronger(Rag8 threatens):

[d]r6k/2p1p1rp/p3q1pb/NpBbPp2/3P1P1P/2P5/P2Q2P1/R3R1K1 w - - 0 2

but I guess other moves also win easily, for example preparing g5 break with Bg7/f8, h7-h6, g5, etc.

if SF is not able to quickly find the tactical break, how will it find the (much better) quiet move?
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