Can any engine independently solve this puzzle?

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Pafifi
Posts: 38
Joined: Sat Nov 16, 2019 2:43 am
Full name: Rong Lin

Can any engine independently solve this puzzle?

Post by Pafifi »

[pgn]
[FEN "6br/1KNp1n1r/2p2p2/P1ppRP2/1kP3pP/3PBB2/PN1P4/8 w - - 0 1"]
1. Bxc5+ Kxc5 2. d4+ Kxd4 3. Nb5+ Kxe5 4. Nd3+ Kxf5 5. Nd4+ Kg6 6. Nf4+ Kg7 7. Nf5+ Kf8 8. Ng6+ Ke8 9. Kc8 gxf3 10. a6 f2 11. a7 f1=Q 12. a8=N Qf4 13. Nc7+ Qxc7+ 14. Kxc7 dxc4 15. Kc8 c3 16. dxc3 c5 17. a4 d5 18. a5 c4 19. a6 d4 20. a7 d3 21. a8=Q d2 22. Qc6#
[/pgn]
Even Sting SF need the first move feed? Or how deep can it find the solution?
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Can any engine independently solve this puzzle?

Post by Vinvin »

I found this : http://talkchess.com/forum3/viewtopic.p ... 30#p339430
Zappa Mexico II finds the good move Bxc5+ after 13m55s on an old octal :

Code: Select all

Post by yanquis1972 » 27 Mar 2010 

Zappa mexico ii with mate extentions finds Bxc5+ at d19/13:55 on octal h/w.

6br/1KNp1n1r/2p2p2/P1ppRP2/1kP3pP/3PBB2/PN1P4/8 w - -

Engine: Zappa Mexico II (2048 MB)
by Anthony Cozzie
...
19/57 13:55 +0.76 1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Ne5 10.Nd6+ Kd8 11.a7 Nxg6 12.a8Q+ Ke7 13.Nf5+ Kf7 14.Bxg4 (4.518.632.851) 5411
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peter
Posts: 3186
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Can any engine independently solve this puzzle?

Post by peter »

Pafifi wrote: ↑Thu Feb 27, 2020 4:05 am Even Sting SF need the first move feed? Or how deep can it find the solution?
With 24 threads of 12x3GHz CPU and 8G hash (max. Sting can use) version 19 had it at a single try after little more then 4 minutes, reaching winning eval after 20 more seconds.
Peter.
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Jouni
Posts: 3293
Joined: Wed Mar 08, 2006 8:15 pm

Re: Can any engine independently solve this puzzle?

Post by Jouni »

Crystal gets this with 4 cores and 2 Gigabytes:

Analysis by Crystal 270819 64 BMI2:
...
1.Re8 Nd6+ 2.Kb6 d4 3.Rb8 dxe3 4.a6 Bxc4 5.a7 Nc8+ 6.Rxc8 Rxc8 7.Nxc4 exd2 8.Bxg4 d5 9.Nd6 Rhxc7 10.Nxc8 Rxc8 11.Kb7 Rg8 12.Bd1 Kc3 13.h5 Rg7+ 14.Kb6 Rg8
= (0.00) Depth: 36/30 00:25:51 9017mN, tb=2290686
1.Bxc5+
= (0.10 ++) Depth: 37/64 00:39:42 14088mN, tb=4709732
1.Bxc5+
= (0.21 ++) Depth: 37/70 00:39:59 14192mN, tb=4831742
1.Bxc5+
+/= (0.37 ++) Depth: 37/70 00:40:11 14265mN, tb=4907904
1.Bxc5+
+/= (0.58 ++) Depth: 37/70 00:40:24 14343mN, tb=4986245
1.Bxc5+
+/- (0.87 ++) Depth: 37/70 00:40:41 14443mN, tb=5012904
1.Bxc5+
+/- (1.26 ++) Depth: 37/87 00:40:58 14548mN, tb=5059378
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Ne5 10.Nd6+ Kd8 11.a7 Nxg6 12.a8Q+ Ke7 13.Nf5+ Kf7 14.Bxg4 Ne5 15.Bd1 dxc4 16.Bc2 Nd3 17.Bxd3 cxd3 18.Qa4 Ke8 19.Qg4 Bxa2 20.Qg6+ Rf7 21.Kc7 Be6 22.Nd6+ Ke7 23.Nxf7 Bxf7 24.Qg3 Kf8 25.Kxd7 c5 26.Qxd3 Rh5 27.Qd6+ Kg7 28.Qg3+ Kf8 29.Kc7 Rd5 30.Qf4 Kg7 31.Kb6 c4 32.Qh2 Kh6 33.Qg1 Re5 34.Qc1 Kh5 35.Qf1
+/- (0.95) Depth: 37/124 00:41:00 14561mN, tb=5064138
1.Bxc5+
+/- (1.06 ++) Depth: 38/84 00:41:15 14650mN, tb=5096098
1.Bxc5+
+/- (1.17 ++) Depth: 38/84 00:42:06 14958mN, tb=5179727
1.Bxc5+
+/- (1.32 ++) Depth: 38/84 00:42:23 15060mN, tb=5220727
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Ne5 10.Nd6+ Kd8 11.a7 Nxg6 12.a8Q+ Ke7 13.Nf5+ Kf7 14.Bxg4 Ne5 15.Bd1 dxc4 16.Bc2 Nd3 17.Bxd3 cxd3 18.Qa4 Ke8 19.Qg4 Bxa2 20.Qg6+ Rf7 21.Kc7 Kf8 22.Nd6 Rg8 23.Qh6+ Ke7 24.Nxf7 Bxf7 25.Qh7 c5 26.Qxd3 d5 27.h5 Bxh5 28.Qxd5 Rg5 29.Qd6+ Kf7 30.Kb6 Bf3 31.Qd7+ Kg6
+/- (1.19) Depth: 38/84 00:42:24 15064mN, tb=5222004

Maybe drewdrew can test with 200 cores and 200 gigabytes for faster solution :) ?
Jouni
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peter
Posts: 3186
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Can any engine independently solve this puzzle?

Post by peter »

Jouni wrote: ↑Thu Feb 27, 2020 4:40 pm Crystal gets this with 4 cores and 2 Gigabytes
Houdini's earlier versions used lesse nullmove pruning than the later ones.

With 24 threads three trials, one at 5 seconds, one at 14 and one at 38.

Here at a single thread (1 core of 3GHz with HT on, 8G hash).
1 minute 14 seconds till having Bc5+ in output:

6br/1KNp1n1r/2p2p2/P1ppRP2/1kP3pP/3PBB2/PN1P4/8 w - - 0 1

Analysis by Houdini 4 Pro x64:

Code: Select all

1.Kb6 Ka3 2.Re7 gxf3 3.Nd1 d4 4.Bf2 Ne5 
  =/+  (-0.42)   Depth: 7/23   00:00:02  19kN
1.Re8 
  =/+  (-0.35 ++)   Depth: 8/23   00:00:02  30kN
1.Re8 
  =  (-0.23 ++)   Depth: 8/24   00:00:02  33kN
1.Re8 
  =  (0.05 ++)   Depth: 8/24   00:00:02  41kN
1.Re8 
  +/-  (0.91 ++)   Depth: 8/26   00:00:02  58kN
1.Re8 Ka3 2.Bxc5+ Kxb2 3.Bxg4 Rxh4 4.Be2 dxc4 5.dxc4 Bh7 6.Rxh8 Nxh8 7.Bf2 
  +/-  (0.98)   Depth: 8/29   00:00:02  73kN
1.Re8 Nd6+ 2.Kb6 Ka3 3.Bxc5+ Kxb2 4.Bxd6 gxf3 5.a6 dxc4 6.a7 f2 7.a8Q f1Q 8.Rxg8 Rxg8 9.Qxg8 Rxh4 10.dxc4 Rxc4 
  +/=  (0.43)   Depth: 9/29   00:00:02  122kN
1.Re8 Nd6+ 
  +/=  (0.36 --)   Depth: 10/38   00:00:02  216kN
1.Re8 Nd6+ 
  =  (0.23 --)   Depth: 10/38   00:00:02  273kN
1.Re8 Nd6+ 
  =  (-0.04 --)   Depth: 10/38   00:00:02  292kN
1.Re8 Nd6+ 
  -/+  (-0.90 --)   Depth: 10/38   00:00:02  396kN
1.Re8 Nd6+ 2.Kb6 d4 3.Bxg4 Nxe8 4.Nxe8 dxe3 5.dxe3 Rh6 6.Kc7 Kc3 7.Na4+ Kxd3 8.Nxc5+ Kxe3 9.Nxd7 Bxc4 10.Nexf6 Rxh4 11.Kxc6 Bxa2 
  -/+  (-1.06)   Depth: 10/41   00:00:02  842kN
1.Re8 
  -/+  (-0.98 ++)   Depth: 11/41   00:00:02  1324kN
1.Re8 
  -/+  (-0.81 ++)   Depth: 11/41   00:00:02  1335kN
1.Re8 
  =/+  (-0.45 ++)   Depth: 11/41   00:00:03  1524kN
1.Re8 Nd6+ 2.Kb6 d4 3.Rb8 Bxc4 4.Rxh8 Rxh8 5.Bf4 Rb8+ 6.Ka7 Rb7+ 7.Ka8 gxf3 8.dxc4 Kxa5 9.Nd3 Rxc7 10.Bxd6 Rc8+ 11.Kb7 Rh8 12.Bc7+ Ka4 13.Nxc5+ Kb4 14.Nxd7 Kxc4 15.Kxc6 
  =  (0.28)   Depth: 11/42   00:00:03  1753kN
1.Re8 Nd6+ 
  =  (0.21 --)   Depth: 12/43   00:00:03  1908kN
1.Re8 Nd6+ 
  =  (0.09 --)   Depth: 12/43   00:00:03  2052kN
1.Re8 Nd6+ 
  =  (-0.19 --)   Depth: 12/43   00:00:03  2114kN
1.Re8 Nd6+ 2.Kb6 d4 3.Rb8 Bf7 4.Na6+ Ka3 5.Bxg4 Rxb8+ 6.Nxb8 dxe3 7.dxe3 Rxh4 8.Nxd7 Kxb2 9.Nxf6 Ne8 10.Nxe8 Bxe8 11.Bd1 Rh3 12.Kxc5 Rxe3 13.d4 
  =/+  (-0.38)   Depth: 12/43   00:00:03  2309kN
1.Re8 
  =/+  (-0.32 ++)   Depth: 13/43   00:00:03  2515kN
1.Re8 
  =  (-0.19 ++)   Depth: 13/43   00:00:03  2547kN
1.Re8 Nd6+ 2.Kb6 d4 3.Rb8 Bf7 4.Na6+ Ka3 5.Bxg4 Rxb8+ 6.Nxb8 dxe3 7.dxe3 Rxh4 8.Nxd7 Rxg4 9.Nxf6 Rg2 10.Nd1 Rxa2 11.a6 Kb3 12.e4 Kb4 13.Ne3 Kc3 14.e5 Nc8+ 15.Kb7 Kxd3 
  =  (-0.13)   Depth: 13/43   00:00:03  2659kN
1.Re8 Nd6+ 
  =  (-0.19 --)   Depth: 14/45   00:00:03  3265kN
1.Re8 Nd6+ 
  =/+  (-0.32 --)   Depth: 14/45   00:00:04  4377kN
1.Re8 Nd6+ 2.Kb6 d4 3.Rb8 Bf7 4.Na6+ Ka3 5.Bxg4 Rxb8+ 6.Nxb8 dxe3 7.dxe3 Rxh4 8.Nxd7 Rxg4 9.Nxf6 Rg2 10.Nd1 Rd2 11.a6 Rxd3 12.Nf2 Rxe3 13.Kxc6 Nxf5 14.a7 Re6+ 15.Kb5 Be8+ 16.Nxe8 Rxe8 17.Kxc5 Ne3 18.Kd4 
  =/+  (-0.31)   Depth: 14/50   00:00:04  5230kN
1.Re8 Nd6+ 
  =/+  (-0.37 --)   Depth: 15/50   00:00:05  5708kN
1.Re8 Nd6+ 
  =/+  (-0.50 --)   Depth: 15/50   00:00:06  7949kN
1.Re8 Nd6+ 2.Kb6 d4 3.a6 Nxe8 4.Bf4 Nxc7 5.Bxc7 Bxc4 6.a7 d5 7.Bxg4 Bxa2 8.Bd1 Ra8 9.Bd6 Ka3 10.Na4 Bb3 11.Bxb3 Kxb3 12.Nxc5+ Kc2 13.Bb8 Kxd2 14.Bf4+ Kc3 15.Bb8 Rxh4 16.Kxc6 Rh7 17.Kb6 Rh3 18.Kb7 
  =/+  (-0.58)   Depth: 15/64   00:00:08  12983kN
1.Re8 
  =/+  (-0.50 ++)   Depth: 16/64   00:00:09  15136kN
1.Re8 
  =/+  (-0.37 ++)   Depth: 16/64   00:00:09  15436kN
1.Re8 Nd6+ 2.Kb6 d4 3.a6 Nxe8 4.Bf4 Bxc4 5.a7 Nxc7 6.Bxc7 d5 7.Bxg4 Bxa2 8.Bd1 Ra8 9.Bd6 Ka3 10.Na4 Bb3 11.Bxb3 Kxb3 12.Nxc5+ Kc2 13.Bb8 Kxd2 14.h5 Kc2 15.Kxc6 Raxa7 16.Bxa7 Rxa7 17.Kxd5 Rh7 18.Ke6 Rh6 19.Kf7 Kc3 20.Kg7 Rxh5 21.Kxf6 Rh2 22.Kf7 Rh7+ 23.Kf6 
  =  (-0.21)   Depth: 16/64   00:00:10  16674kN
1.Re8 Nd6+ 
  =  (-0.27 --)   Depth: 17/64   00:00:11  19980kN
1.Re8 Nd6+ 
  =/+  (-0.40 --)   Depth: 17/64   00:00:14  26506kN
1.Re8 Nd6+ 2.Kb6 d4 3.a6 Nxe8 4.Bf4 Bxc4 5.a7 Nxc7 6.Bxc7 d5 7.Bxg4 Bxa2 8.Bd1 Bb3 9.Bb8 Rxa7 10.Bxa7 Ka3 11.Bxb3 Kxb3 12.Kxc6 Kxb2 13.Bxc5 Kc2 14.Kxd5 Kxd3 15.Be7 Rh5 16.Ke6 Ke4 17.Bxf6 Rh6 18.Kf7 Kxf5 19.Bxd4 Rxh4 20.Bc3 Ke4 21.d3+ Kd5 22.Ke7 Rh3 23.Kf7 Rf3+ 24.Ke7 Re3+ 25.Kd7 
  =  (-0.28)   Depth: 17/64   00:00:17  32984kN, tb=27
1.Re8 Nd6+ 
  =/+  (-0.34 --)   Depth: 18/64   00:00:18  36298kN, tb=54
1.Re8 Nd6+ 
  =/+  (-0.47 --)   Depth: 18/64   00:00:24  48010kN, tb=54
1.Re8 Nd6+ 2.Kb6 d4 3.a6 Nxe8 4.Bf4 Bxc4 5.a7 Nxc7 6.Bxc7 d5 7.Bxg4 Bxa2 8.Bd1 Bb3 9.Bb8 Rxa7 10.Bxa7 Rh7 11.Bb8 Ka3 12.Bxb3 Kxb3 13.Nd1 Kc2 14.Nf2 c4 15.Kxc6 c3 16.dxc3 dxc3 17.Kxd5 Kb1 18.Bf4 Rxh4 19.Be3 c2 20.Ke6 Rh2 21.Ne4 Rh3 22.Bd2 Rxd3 23.Kxf6 Kb2 24.Bf4 Rd4 25.Ke5 
  =/+  (-0.65)   Depth: 18/74   00:00:30  63301kN, tb=58
1.Re8 
  =/+  (-0.57 ++)   Depth: 19/74   00:00:38  79970kN, tb=58
1.Re8 
  =/+  (-0.43 ++)   Depth: 19/74   00:00:41  87001kN, tb=66
1.Re8 
  =  (-0.14 ++)   Depth: 19/74   00:00:44  94156kN, tb=67
1.Re8 Nd6+ 2.Kb6 d4 3.Rb8 Bf7 4.Na6+ Ka3 5.Bxg4 dxe3 6.dxe3 Kxb2 7.Kxc5+ Rxb8 8.Nxb8 Nb7+ 9.Kb6 Nxa5 10.Nxd7 Bxc4 11.Kxa5 Bxd3 12.Nc5 Kc3 13.h5 Kd2 14.Kb6 Bc2 15.e4 Rg7 16.Bh3 Rg5 17.h6 Rh5 18.Bf1 Rxh6 19.Kxc6 Rh1 20.Bc4 Rh4 21.Bd5 
  =  (-0.29)   Depth: 19/74   00:00:55  118MN, tb=101
1.Re8 Nd6+ 
  =/+  (-0.35 --)   Depth: 20/74   00:01:03  137MN, tb=101
1.Bxc5+ 
  =  (-0.22 ++)   Depth: 20/74   00:01:15  164MN, tb=101
1.Bxc5+ 
  =  (-0.09 ++)   Depth: 20/74   00:01:17  167MN, tb=101
1.Bxc5+ 
  =  (0.18 ++)   Depth: 20/76   00:01:19  172MN, tb=101
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 gxf3 10.a7 Nd8+ 11.Kb6 Kf7 12.Nxh8+ Rxh8 13.a8Q f2 14.Ng3 Ne6 15.cxd5 cxd5 16.Qa4 Ke8 17.Qg4 Kf7 18.Qf5 Rxh4 19.Qxf2 Bh7 20.Nf5 Rf4 21.Nd6+ Ke7 22.Qh2 Bg6 23.Nc8+ Kd8 24.Qh8+ Be8 
  =  (0.23)   Depth: 20/76   00:01:21  176MN, tb=101
1.Bxc5+ 
  =  (0.30 ++)   Depth: 20/76   00:01:23  181MN, tb=101
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Ne5 10.Nd6+ Kd8 11.a7 Nxg6 12.a8Q+ Ke7 13.Nf5+ Kf7 14.Bxg4 Nxh4 15.Nd6+ Kg7 16.Ne8+ Kg6 17.Qd8 Rf7 18.cxd5 cxd5 19.Nd6 Rfh7 20.Qb6 Be6 21.Qg1 Kh6 22.Qg3 Ng6 23.Qe3+ Kg7 24.Bxe6 dxe6 25.Qxe6 Ne5 26.Qxd5 Rd8 27.Ka6 Kf8 28.Qe6 Ra8+ 29.Kb6 Rb8+ 30.Kc5 Rc7+ 31.Kd5 
  +/=  (0.42)   Depth: 20/76   00:01:28  192MN, tb=101
1.Bxc5+ Kxc5 
  +/=  (0.35 --)   Depth: 20/76   00:01:30  198MN, tb=101
1.Bxc5+ 
  +/=  (0.48 ++)   Depth: 20/78   00:01:37  213MN, tb=101
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Ne5 10.Nd6+ Kd8 11.a7 Nxg6 12.a8Q+ Ke7 13.Nf5+ Kf7 14.Bxg4 Ne5 15.Bd1 Kg6 16.Qf8 d6+ 17.Ka6 d4 18.Ne7+ Rxe7 19.h5+ Kf5 20.Qxe7 Bxc4+ 21.Kb6 Bxa2 22.Qg7 Rg8 23.Bc2+ d3 24.Qh7+ Kg5 25.Bxd3 Nxd3 26.Qxd3 Bd5 27.Qh3 f5 28.h6 Rh8 29.Qg3+ Kh5 30.Qf4 Rxh6 31.Qxf5+ Kh4 32.Qf4+ Kh5 
  +/=  (0.43)   Depth: 20/78   00:01:40  219MN, tb=101
1.Bxc5+ 
  +/=  (0.50 ++)   Depth: 20/84   00:01:42  225MN, tb=101
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Ne5 10.Nd6+ Kd8 11.a7 Nxg6 12.a8Q+ Ke7 13.Nf5+ Kf7 14.Bxg4 Ne5 15.Bd1 Kg6 16.Qf8 d6+ 17.Ka6 d4 18.Ne7+ Rxe7 19.h5+ Kf5 20.Qxe7 Bxc4+ 21.Kb6 Bxa2 22.Qg7 Rg8 23.Bc2+ d3 24.Qh7+ Kg5 25.Bxd3 Nxd3 26.Qxd3 Bd5 27.Qh3 Rb8+ 28.Kc7 Re8 29.h6 Rh8 30.h7 Kg6 31.Kxd6 Rxh7 32.Qg4+ Kf7 33.d3 Rh1 34.Qf5 Rh4 35.Qd7+ Kg6 36.Qe8+ Kg5 37.Qe3+ Kg4 
  +/=  (0.41)   Depth: 20/84   00:01:46  234MN, tb=101
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Ne5 10.Nd6+ Kd8 11.a7 Nxg6 12.a8Q+ Ke7 13.Nf5+ Kf7 14.Bxg4 Ne5 15.Bd1 Kg6 16.Qf8 d6+ 17.Ka6 d4 18.Ne7+ Rxe7 19.h5+ Kf5 20.Qxe7 Bxc4+ 21.Kb6 Bxa2 22.Qg7 Rg8 23.Bc2+ d3 24.Qh7+ Kg5 25.Bxd3 Nxd3 26.Qxd3 Bd5 27.Qh3 Rb8+ 28.Kc7 Re8 29.Qg3+ Kxh5 30.Qxd6 Re6 31.Qf4 Kg6 32.Qg4+ Kf7 33.Qh5+ Kg7 34.d3 Re5 35.Qg4+ Rg5 36.Qf4 c5 
  +/=  (0.39)   Depth: 21/84   00:02:05  279MN, tb=101
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Ne5 10.Nd6+ Kd8 11.a7 Nxg6 12.a8Q+ Ke7 13.Nf5+ Kf7 14.Bxg4 Ne5 15.Bd1 Kg6 16.Qf8 d6+ 17.Ka6 d4 18.Ne7+ Rxe7 19.h5+ Kf5 20.Qxe7 Bxc4+ 21.Kb6 Bxa2 22.Qg7 Rg8 23.Bc2+ d3 24.Qh7+ Kg5 25.Bxd3 Nxd3 26.Qxd3 Bd5 27.Qh3 Rb8+ 28.Kc7 Re8 29.h6 Rh8 30.Qg3+ Kxh6 31.Kxd6 Rg8 32.Qh4+ Kg6 33.d3 Rg7 34.Qg4+ Kf7 35.Qh5+ Rg6 36.Qh7+ Rg7 37.Qf5 Rg5 38.Qd7+ Kg6 39.Qe8+ Kf5 40.Qe7 
  +/=  (0.39)   Depth: 22/87   00:02:40  362MN, tb=102
1.Bxc5+ 
  +/=  (0.45 ++)   Depth: 23/88   00:03:08  425MN, tb=111
1.Bxc5+ 
  +/=  (0.59 ++)   Depth: 23/88   00:03:22  455MN, tb=112
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Ne5 10.Nd6+ Kd8 11.a7 Nxg6 12.a8Q+ Ke7 13.Nf5+ Kf7 14.Bxg4 Ne5 15.Bd1 Kg6 16.Qf8 d6+ 17.Ka6 d4 18.Ne7+ Rxe7 19.h5+ Kf5 20.Qxe7 Bxc4+ 21.Kb6 Bxa2 22.Qg7 Rg8 23.Qh7+ Kg5 24.Qe4 Bb3 25.Bxb3 Rb8+ 26.Kc7 Rxb3 27.Kxd6 Rf3 28.Qh7 Rf2 29.d3 Rh2 30.Ke6 Rxh5 31.Qf5+ Kh4 32.Qf2+ Kh3 33.Qxd4 Ng4 34.Qc4 Ne5 
  +/=  (0.50)   Depth: 23/89   00:03:54  534MN, tb=112
1.Bxc5+ 
  +/=  (0.58 ++)   Depth: 24/89   00:04:39  634MN, tb=121
1.Bxc5+ Kxc5 
  +/=  (0.44 --)   Depth: 24/92   00:05:32  765MN, tb=134
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Ne5 10.Nd6+ Kd8 11.a7 Nxg6 12.a8Q+ Ke7 13.Nf5+ Kf7 14.Bxg4 Ne5 15.Bd1 Kg6 16.Qf8 d6+ 17.Ka6 d4 18.Ne7+ Rxe7 19.h5+ Kf5 20.Qxe7 Bxc4+ 21.Kb6 Bxa2 22.Qg7 Rg8 23.Qh7+ Kg5 24.Qe4 f5 25.Qxd4 Bd5 26.Kc7 Rh8 27.Qe3+ f4 28.Qg1+ Kh6 29.Kxd6 Re8 30.Kc5 Re6 31.Qh2 Rf6 32.Kb4 Nf3 33.Qe2 Re6 34.Qf2 Ng5 35.Bc2 Nf3 36.Bg6 Re1 37.Kc5 Rc1+ 38.Kd6 
  +/=  (0.47)   Depth: 24/98   00:07:44  1081MN, tb=168
1.Bxc5+ Kxc5 
  +/=  (0.41 --)   Depth: 25/98   00:10:00  1419MN, tb=222
1.Bxc5+ 
  +/=  (0.54 ++)   Depth: 25/98   00:12:03  1701MN, tb=261
1.Bxc5+ 
  +/-  (0.71 ++)   Depth: 25/98   00:12:48  1801MN, tb=286
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Ne5 10.Nd6+ Kd8 11.a7 Nxg6 12.a8Q+ Ke7 13.Nf5+ Kf7 14.Bxg4 Ne5 15.Bd1 dxc4 16.Bc2 Nd3 17.Bxd3 cxd3 18.Qa4 Ke8 19.Qg4 Bxa2 20.Qg6+ Rf7 21.Kc7 Kf8 22.Nd6 Rg8 23.Qh6+ Ke7 24.Nxf7 Bxf7 25.Qh7 Rg3 26.h5 d5 27.Kxc6 Ke6 28.h6 Be8+ 29.Kb7 Bf7 30.Kb6 Rg6 31.Kc5 Rg3 32.Kb5 Be8+ 33.Kb6 Bf7 34.Kc5 Rg6 35.Kc6 Be8+ 36.Kc5 Bf7 37.Kc6 
  +/-  (0.78)   Depth: 25/98   00:14:23  2022MN, tb=366
1.Bxc5+ 
  +/-  (0.86 ++)   Depth: 26/98   00:15:28  2168MN, tb=425
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Ne5 10.Nd6+ Kd8 11.a7 Nxg6 12.a8Q+ Ke7 13.Nf5+ Kf7 14.Bxg4 Ne5 15.Bd1 dxc4 16.Bc2 Nd3 17.Bxd3 cxd3 18.Qa4 Ke8 19.Qg4 Bxa2 20.Qg6+ Rf7 21.Kc7 Kf8 22.Nd6 Rg8 23.Qh6+ Ke7 24.Nxf7 Bxf7 25.Qh7 Rg3 26.h5 d5 27.Kxc6 Ke6 28.h6 Be8+ 29.Kb7 Bf7 30.Kb6 Rg6 31.Kc5 Rg3 32.Kb5 Be8+ 33.Kb6 Bf7 34.Kb7 Rg6 35.Kc7 Rg3 36.Qh8 Rg8 
  +/-  (0.94)   Depth: 26/98   00:18:22  2578MN, tb=723
1.Bxc5+ 
  +/-  (1.03 ++)   Depth: 27/98   00:23:10  3231MN, tb=1028
1.Bxc5+ 
  +/-  (1.21 ++)   Depth: 27/98   00:26:02  3617MN, tb=1346
1.Bxc5+ Kxc5 
  +/-  (0.86 --)   Depth: 27/100   00:28:54  4054MN, tb=1432
Fritz 15 (Rybka) gets it rather quickly with 24 threads too but stays at 0.00 eval quite a while.
Peter.
Top
Dann Corbit
Posts: 12542
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Can any engine independently solve this puzzle?

Post by Dann Corbit »

This is the complete set of analyzed EPD records for that puzzle:

Code: Select all

Q1K1k1br/5n1r/5pN1/5N2/2p4P/2P5/3p4/8 w - - acd 40; acs 0; bm Qa4# Qc6#; c3 "Qc6#"; ce 32766; dm 1; pm Qa4# Qc6#; pv Qc6#; 
Q1K1k1br/5n1r/5pN1/5N2/2p4P/2Pp4/8/8 b - - acd 40; acs 0; bm Nd6+ d2; c3 "d2"; ce -32765; dm -1; pm Nd6+ d2; pv Nd6+ Nxd6#; 
2K1k1br/P4n1r/5pN1/5N2/2p4P/2Pp4/8/8 w - - acd 40; acs 0; bm a8=B a8=N a8=Q; c3 "a8=Q"; ce 32764; dm 2; pm a8=B a8=N a8=Q; pv a8=Q Nd6+ Nxd6#; 
2K1k1br/P4n1r/5pN1/5N2/2pp3P/2P5/8/8 b - - acd 40; acs 0; bm dxc3 d3; c3 "d3"; ce -32763; dm -2; pm dxc3 d3; pv dxc3 a8=Q c2 Qa4#; 
2K1k1br/5n1r/P4pN1/5N2/2pp3P/2P5/8/8 w - - acd 40; acs 0; bm a7; c3 "a7"; ce 32762; dm 3; pm a7; pv a7 d3 a8=Q Nd6+ Nxd6#; 
2K1k1br/5n1r/P4pN1/3p1N2/2p4P/2P5/8/8 b - - acd 40; acs 0; bm d4; c3 "d4"; ce -32761; dm -3; pm d4; pv d4 a7 dxc3 a8=Q c2 Qa4#; 
2K1k1br/5n1r/5pN1/P2p1N2/2p4P/2P5/8/8 w - - acd 40; acs 0; bm a6; c3 "a6"; ce 32760; dm 4; pm a6; pv a6 d4 a7 d3 a8=Q Nd6+ Nxd6#; 
2K1k1br/5n1r/5pN1/P1pp1N2/7P/2P5/8/8 b - - acd 40; acs 0; bm d4 c4; c3 "c4"; ce -32759; dm -4; pm d4 c4; pv d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
2K1k1br/5n1r/5pN1/2pp1N2/P6P/2P5/8/8 w - - acd 40; acs 0; bm a5; c3 "a5"; ce 32758; dm 5; pm a5; pv a5 d4 a6 d3 a7 d2 a8=N Nd6+ Nxd6#; 
2K1k1br/3p1n1r/5pN1/2p2N2/P6P/2P5/8/8 b - - acd 40; acs 0; bm d6 d5; c3 "d5"; ce -32757; dm -5; pm d6 d5; pv d6 a5 d5 a6 d4 a7 d3 a8=Q d2 Qa4#; 
2K1k1br/3p1n1r/5pN1/2p2N2/7P/2P5/P7/8 w - - acd 40; acs 0; bm a4; c3 "a4"; ce 32756; dm 6; pm a4; pv a4 d6 a5 d5 a6 d4 a7 d3 a8=Q Nd6+ Nxd6#; 
2K1k1br/3p1n1r/2p2pN1/5N2/7P/2P5/P7/8 b - - acd 40; acs 1; bm d5 c5; c3 "c5"; ce -32755; dm -6; pm d5 c5; pv d5 a4 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
2K1k1br/3p1n1r/2p2pN1/5N2/7P/2p5/P2P4/8 w - - acd 40; acs 0; bm dxc3; c3 "dxc3"; ce 32754; dm 7; pm dxc3; pv dxc3 d6 a4 d5 a5 c5 a6 d4 a7 d3 a8=Q Nd6+ Nxd6#; 
2K1k1br/3p1n1r/2p2pN1/5N2/2p4P/8/P2P4/8 b - - acd 40; acs 1; bm d5 c3; c3 "c3"; ce -32753; dm -7; pm d5 c3; pv d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
4k1br/2Kp1n1r/2p2pN1/5N2/2p4P/8/P2P4/8 w - - acd 40; acs 5; bm Kc8 a4; c3 "Kc8"; ce 32752; dm 8; pm Kc8 a4; pv a4 d6 Kc8 c3 dxc3 d5 a5 c5 a6 d4 a7 d3 a8=Q Nd6+ Nxd6#; 
4k1br/2Kp1n1r/2p2pN1/3p1N2/2P4P/8/P2P4/8 b - - acd 40; acs 0; bm d4 dxc4; c3 "dxc4"; ce -32751; dm -8; pm d4 dxc4; pv d4 c5 d6 Kc8 dxc5 a4 d3 a5 c4 a6 c3 a7 c5 a8=B cxd2 Bc6#; 
2K1k1br/2qp1n1r/2p2pN1/3p1N2/2P4P/8/P2P4/8 w - - acd 40; acs 1; bm Kxc7; c3 "Kxc7"; ce 32750; dm 9; pm Kxc7; pv Kxc7 dxc4 a4 c3 dxc3 d6 Kc8 d5 a5 c5 a6 d4 a7 d3 a8=Q Nd6+ Nxd6#; 
2K1k1br/2Np1n1r/2p2pN1/3p1N2/2P2q1P/8/P2P4/8 b - - acd 40; acs 4; bm Qxc7+; c3 "Qxc7+"; ce -32749; dm -9; pm Qxc7+; pv Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
N1K1k1br/3p1n1r/2p2pN1/3p1N2/2P2q1P/8/P2P4/8 w - - acd 40; acs 29; bm Nc7+; c1 "#10; 09:09; 00:01 @ C0/R0/K1/P5/X27;"; c3 "Nc7+"; ce 32748; dm 10; id "ChestDB.6074"; pm Nc7+; pv Nc7+ Qxc7+ Kxc7 dxc4 a4 c3 dxc3 d6 Kc8 d5 a5 c5 a6 d4 a7 d3 a8=Q Nd6+ Nxd6#; 
N1K1k1br/3p1n1r/2p2pN1/3p1N2/2P4P/8/P2P4/5q2 b - - acd 40; acs 2; bm Qf4; c3 "Qf4"; ce -32747; dm -10; pm Qf4; pv Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
2K1k1br/P2p1n1r/2p2pN1/3p1N2/2P4P/8/P2P4/5q2 w - - acd 40; acs 237; bm a8=N; c3 "a8=N"; ce 32746; dm 11; pm a8=N; pv a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 a4 c3 dxc3 d6 Kc8 d5 a5 c5 a6 d4 a7 d3 a8=Q Nd6+ Nxd6#; 
2K1k1br/P2p1n1r/2p2pN1/3p1N2/2P4P/8/P2P1p2/8 b - - acd 40; acs 0; bm f1=Q; c3 "f1=Q"; ce -32745; dm -11; pm f1=Q; pv f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
2K1k1br/3p1n1r/P1p2pN1/3p1N2/2P4P/8/P2P1p2/8 w - - acd 40; acs 1336; bm a7; c1 "#12; 00:06 @ C0/R0/K1/P6/X29;"; c3 "a7"; ce 32744; dm 12; id "ChestDB.6703"; pm a7; pv a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 a4 c3 dxc3 d6 Kc8 d5 a5 c5 a6 d4 a7 d3 a8=Q Nd6+ Nxd6#; 
2K1k1br/3p1n1r/P1p2pN1/3p1N2/2P4P/5p2/P2P4/8 b - - acd 40; acs 0; bm f2; c3 "f2"; ce -32743; dm -12; pm f2; pv f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
2K1k1br/3p1n1r/2p2pN1/P2p1N2/2P4P/5p2/P2P4/8 w - - acd 40; acs 0; bm a6; c3 "a6"; ce 32742; dm 13; pm a6; pv a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
2K1k1br/3p1n1r/2p2pN1/P2p1N2/2P3pP/5B2/P2P4/8 b - - acd 40; acs 0; bm gxf3; c3 "gxf3"; ce -32741; dm -13; pm gxf3; pv gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
4k1br/1K1p1n1r/2p2pN1/P2p1N2/2P3pP/5B2/P2P4/8 w - - acd 40; acs 0; bm Kc8; c3 "Kc8"; c5 "2012.10.12; immortal;"; ce 32740; dm 14; id "Hard-Talkchess-2020.074"; aid dorszcz.0287; pm Kc8; pv Kc8 gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
5kbr/1K1p1n1r/2p2pN1/P2p1N2/2P3pP/5B2/P2P4/8 b - - acd 40; acs 0; bm Ke8; c3 "Ke8"; ce -32739; dm -14; pm Ke8; pv Ke8 Kc8 gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
5kbr/1K1p1n1r/2p2p2/P2p1N2/2P2NpP/5B2/P2P4/8 w - - acd 40; acs 0; bm Ng6+; c3 "Ng6+"; ce 32738; dm 15; pm Ng6+; pv Ng6+ Ke8 Kc8 gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
6br/1K1p1nkr/2p2p2/P2p1N2/2P2NpP/5B2/P2P4/8 b - - acd 40; acs 0; bm Kf8; c3 "Kf8"; ce -32737; dm -15; pm Kf8; pv Kf8 Ng6+ Ke8 Kc8 gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
6br/1K1p1nkr/2p2p2/P2p4/2PN1NpP/5B2/P2P4/8 w - - acd 40; acs 0; bm Nf5+; c3 "Nf5+"; ce 32736; dm 16; pm Nf5+; pv Nf5+ Kf8 Ng6+ Ke8 Kc8 gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
6br/1K1p1n1r/2p2pk1/P2p4/2PN1NpP/5B2/P2P4/8 b - - acd 40; acs 0; bm Kg7; c3 "Kg7"; ce -32735; dm -16; pm Kg7; pv Kg7 Nf5+ Kf8 Ng6+ Ke8 Kc8 gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
6br/1K1p1n1r/2p2pk1/P2p4/2PN2pP/3N1B2/P2P4/8 w - - acd 40; acs 0; bm Nf4+; c3 "Nf4+"; ce 32734; dm 17; pm Nf4+; pv Nf4+ Kg7 Nf5+ Kf8 Ng6+ Ke8 Kc8 gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
6br/1K1p1n1r/2p2p2/P2p1k2/2PN2pP/3N1B2/P2P4/8 b - - acd 40; acs 0; bm Kg6; c3 "Kg6"; ce -32733; dm -17; pm Kg6; pv Kg6 Nf4+ Kg7 Nf5+ Kf8 Ng6+ Ke8 Kc8 gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
6br/1K1p1n1r/2p2p2/PN1p1k2/2P3pP/3N1B2/P2P4/8 w - - acd 40; acs 0; bm Nd4+; c3 "Nd4+"; ce 32732; dm 18; pm Nd4+; pv Nd4+ Kg6 Nf4+ Kg7 Nf5+ Kf8 Ng6+ Ke8 Kc8 gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
6br/1K1p1n1r/2p2p2/PN1pkP2/2P3pP/3N1B2/P2P4/8 b - - acd 40; acs 0; bm Kxf5; c3 "Kxf5"; ce -32731; dm -18; pm Kxf5; pv Kxf5 Nd4+ Kg6 Nf4+ Kg7 Nf5+ Kf8 Ng6+ Ke8 Kc8 gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
6br/1K1p1n1r/2p2p2/PN1pkP2/2P3pP/5B2/PN1P4/8 w - - acd 40; acs 0; bm Nd3+; c3 "Nd3+"; ce 32730; dm 19; pm Nd3+; pv Nd3+ Kxf5 Nd4+ Kg6 Nf4+ Kg7 Nf5+ Kf8 Ng6+ Ke8 Kc8 gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
6br/1K1p1n1r/2p2p2/PN1pRP2/2Pk2pP/5B2/PN1P4/8 b - - acd 40; acs 0; bm Kxe5; c3 "Kxe5"; ce -32729; dm -19; pm Kxe5; pv Kxe5 Nd3+ Kxf5 Nd4+ Kg6 Nf4+ Kg7 Nf5+ Kf8 Ng6+ Ke8 Kc8 gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
6br/1KNp1n1r/2p2p2/P2pRP2/2Pk2pP/5B2/PN1P4/8 w - - acd 40; acs 0; bm Nb5+; c3 "Nb5+"; ce 32728; dm 20; pm Nb5+; pv Nb5+ Kxe5 Nd3+ Kxf5 Nd4+ Kg6 Nf4+ Kg7 Nf5+ Kf8 Ng6+ Ke8 Kc8 gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
6br/1KNp1n1r/2p2p2/P1kpRP2/2PP2pP/5B2/PN1P4/8 b - - acd 40; acs 0; bm Kxd4; c3 "Kxd4"; ce -32727; dm -20; pm Kxd4; pv Kxd4 Nb5+ Kxe5 Nd3+ Kxf5 Nd4+ Kg6 Nf4+ Kg7 Nf5+ Kf8 Ng6+ Ke8 Kc8 gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
6br/1KNp1n1r/2p2p2/P1kpRP2/2P3pP/3P1B2/PN1P4/8 w - - acd 40; acs 0; bm d4+; c3 "d4+"; ce 32726; dm 21; pm d4+; pv d4+ Kxd4 Nb5+ Kxe5 Nd3+ Kxf5 Nd4+ Kg6 Nf4+ Kg7 Nf5+ Kf8 Ng6+ Ke8 Kc8 gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
6br/1KNp1n1r/2p2p2/P1BpRP2/1kP3pP/3P1B2/PN1P4/8 b - - acd 40; acs 0; bm Kxc5; c3 "Kxc5"; ce -32725; dm -21; pm Kxc5; pv Kxc5 d4+ Kxd4 Nb5+ Kxe5 Nd3+ Kxf5 Nd4+ Kg6 Nf4+ Kg7 Nf5+ Kf8 Ng6+ Ke8 Kc8 gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#; 
6br/1KNp1n1r/2p2p2/P1ppRP2/1kP3pP/3PBB2/PN1P4/8 w - - acd 40; acs 0; bm Bxc5+; c0 "2 Prize Humor Tourney EBUR#107 {m}; 2004; Van Essen, Mark; White wins; 2188; 2004"; c1 "#22;"; c3 "Bxc5+"; c5 "Computer Chess Test Suite; EPD2diag V1.5; 2018.09.27; ?; Bxc5+;"; c6 "Arves.07013"; ce 32724; dm 22; id "yacpdb id 275467"; aid dorszcz.0523; pm Bxc5+; pv Bxc5+ Kxc5 d4+ Kxd4 Nb5+ Kxe5 Nd3+ Kxf5 Nd4+ Kg6 Nf4+ Kg7 Nf5+ Kf8 Ng6+ Ke8 Kc8 gxf3 a6 f2 a7 f1=Q a8=N Qf4 Nc7+ Qxc7+ Kxc7 dxc4 Kc8 d5 a4 c3 dxc3 c5 a5 d4 a6 d3 a7 d2 a8=N d1=R Nc7#;
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peter
Posts: 3186
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Can any engine independently solve this puzzle?

Post by peter »

Vinvin wrote: ↑Thu Feb 27, 2020 9:58 am I found this : http://talkchess.com/forum3/viewtopic.p ... 30#p339430
Zappa Mexico II finds the good move Bxc5+ after 13m55s on an old octal :

Code: Select all

Post by yanquis1972 » 27 Mar 2010 

Zappa mexico ii with mate extentions finds Bxc5+ at d19/13:55 on octal h/w.

6br/1KNp1n1r/2p2p2/P1ppRP2/1kP3pP/3PBB2/PN1P4/8 w - -

Engine: Zappa Mexico II (2048 MB)
by Anthony Cozzie
...
19/57 13:55 +0.76 1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Ne5 10.Nd6+ Kd8 11.a7 Nxg6 12.a8Q+ Ke7 13.Nf5+ Kf7 14.Bxg4 (4.518.632.851) 5411
At 24 threads of 12x3GHz and 32 G hash three trials, each about as fast as this one:

6br/1KNp1n1r/2p2p2/P1ppRP2/1kP3pP/3PBB2/PN1P4/8 w - - 0 1

Analysis by Zappa Mexico II x64:

Code: Select all

1.Kb6 d4 2.Re8 Nd6 3.a6 Nxe8 4.Nxe8 Bf7 5.Nxf6 gxf3 6.Nxh7 dxe3 
  =/+  (-0.54)   Depth: 10/39   00:00:17  1218kN
1.Re8 Nd6+ 2.Kb6 d4 3.a6 Nxe8 4.Nxe8 Bxc4 
  =  (0.14)   Depth: 10/39   00:00:18  1860kN
1.Re8 Nd6+ 2.Kb6 d4 3.a6 Nxe8 4.Nxe8 Bxc4 
  =  (0.14)   Depth: 10/39   00:00:18  2254kN
1.Re8 Nd6+ 2.Kb6 d4 3.Rb8 Bf7 4.Rxh8 Rxh8 5.Bxg4 dxe3 6.dxe3 
  =/+  (-0.43)   Depth: 11/41   00:00:18  2678kN
1.Re8 Nd6+ 2.Kb6 d4 3.Rb8 Bf7 4.Rxh8 Rxh8 5.Bxg4 dxe3 6.dxe3 
  =/+  (-0.43)   Depth: 11/41   00:00:18  5070kN
1.Re8 Nd6+ 2.Kb6 d4 3.Bxg4 dxe3 4.Rd8 exd2 5.a6 Bf7 6.Rxd7 
  =  (0.00)   Depth: 12/43   00:00:18  5547kN
1.Re8 Nd6+ 2.Kb6 d4 3.Bxg4 dxe3 4.Rd8 exd2 5.a6 Bf7 6.Rxd7 
  =  (0.00)   Depth: 12/43   00:00:19  7598kN
1.Re8 Nd6+ 2.Kb6 d4 3.Bxg4 Nxe8 4.Nxe8 dxe3 5.dxe3 Rh6 6.a6 Bxc4 7.Nxc4 Rxe8 
  =  (-0.27)   Depth: 13/44   00:00:19  8329kN
1.Re8 Nd6+ 2.Kb6 d4 3.Bxg4 Nxe8 4.Nxe8 dxe3 5.dxe3 Rh6 6.a6 Bxc4 7.Nxc4 Rxe8 
  =  (-0.27)   Depth: 13/45   00:00:21  17758kN
1.Re8 Nd6+ 2.Kb6 d4 3.Bxg4 Nxe8 4.Nxe8 dxe3 5.dxe3 Rh6 6.a6 Bh7 
  =  (-0.27)   Depth: 14/47   00:00:21  18948kN
1.Re8 Nd6+ 2.Kb6 d4 3.Bxg4 Nxe8 4.Nxe8 dxe3 5.dxe3 Rh6 6.a6 Bh7 
  =  (-0.27)   Depth: 14/47   00:00:23  29840kN
1.Re8 Nd6+ 2.Kb6 d4 3.Rd8 dxe3 4.Bxg4 Bxc4 5.a3+ Kb3 6.Rxh8 Rxh8 7.Nxc4 Nxc4+ 8.dxc4 exd2 
  =/+  (-0.38)   Depth: 15/49   00:00:23  34942kN
1.Re8 Nd6+ 2.Kb6 d4 3.Rd8 dxe3 4.Bxg4 Bxc4 5.a3+ Kb3 6.Rxh8 Rxh8 7.Nxc4 Nxc4+ 8.dxc4 exd2 
  =/+  (-0.38)   Depth: 15/49   00:00:27  67947kN
1.Re8 Nd6+ 2.Kb6 d4 3.Rd8 dxe3 4.Bxg4 Bxc4 5.a3+ Kb3 6.Rxh8 Rxh8 7.Nxc4 Nxc4+ 8.dxc4 exd2 
  =/+  (-0.42)   Depth: 16/51   00:00:28  73541kN
1.Re8 Nd6+ 2.Kb6 d4 3.Rd8 dxe3 4.Bxg4 Bxc4 5.a3+ Kb3 6.Rxh8 Rxh8 7.Nxc4 Nxc4+ 8.dxc4 exd2 
  =/+  (-0.42)   Depth: 16/51   00:00:34  133MN
1.Re8 Nd6+ 2.Kb6 d4 3.Rd8 dxe3 4.Bxg4 exd2 5.a6 Bxc4 6.Rxh8 Rxh8 7.Nxc4 Nxc4+ 8.dxc4 
  =  (-0.26)   Depth: 17/53   00:00:36  144MN
1.Re8 Nd6+ 2.Kb6 d4 3.Rd8 dxe3 4.Bxg4 exd2 5.a6 Bxc4 6.Rxh8 Rxh8 7.Nxc4 Nxc4+ 8.dxc4 
  =  (-0.26)   Depth: 17/53   00:00:45  222MN
1.Re8 Nd6+ 2.Kb6 d4 3.Rd8 dxe3 4.Bxg4 exd2 5.a6 Bxc4 6.Rxh8 Rxh8 7.dxc4 Rxh4 8.Bd1 Nc8+ 
  =  (0.00)   Depth: 18/55   00:00:48  247MN
1.Re8 Nd6+ 2.Kb6 d4 3.Rd8 dxe3 4.Bxg4 exd2 5.a6 Bxc4 6.Rxh8 Rxh8 7.dxc4 Rxh4 8.Bd1 Nc8+ 
  =  (0.00)   Depth: 18/55   00:01:05  406MN
1.Re8 Nd6+ 2.Kb6 d4 3.Rd8 dxe3 4.Bxg4 exd2 5.a6 Bxc4 6.Rxh8 Rxh8 7.dxc4 Rb8+ 8.Ka7 Rg8 9.Be2 Nxf5 
  =  (-0.06)   Depth: 19/57   00:01:10  450MN
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Nd8+ 10.Kb6 Kf7 11.Nxh8+ Rxh8 12.a7 gxf3 13.a8Q 
  +/=  (0.67)   Depth: 19/57   00:01:36  706MN
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Nd8+ 10.Kb6 Kf7 11.Nxh8+ Rxh8 12.a7 gxf3 13.a8Q 
  +/=  (0.67)   Depth: 19/57   00:01:45  792MN
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Nd8+ 10.Kb6 Kf7 11.Nxh8+ Rxh8 12.a7 gxf3 13.a8Q Bh7 
  +/=  (0.67)   Depth: 20/59   00:01:49  827MN
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Nd8+ 10.Kb6 Kf7 11.Nxh8+ Rxh8 12.a7 gxf3 13.a8Q Bh7 
  +/=  (0.67)   Depth: 20/59   00:02:30  1215MN
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Nd8+ 10.Kb6 Kf7 11.Nxh8+ Rxh8 12.a7 gxf3 13.a8Q f2 14.Ng3 Bh7 
  +/=  (0.34)   Depth: 21/61   00:02:42  1353MN
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Nd8+ 10.Kb6 Kf7 11.Nxh8+ Rxh8 12.a7 gxf3 13.a8Q f2 14.Ng3 Bh7 
  +/=  (0.34)   Depth: 21/61   00:04:33  2663MN
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Nd8+ 10.Kb6 Kf7 11.Nxh8+ Rxh8 12.a7 gxf3 13.a8Q f2 14.Ng3 Bh7 
  +/=  (0.34)   Depth: 22/63   00:04:48  2814MN
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Nd8+ 10.Kb6 Kf7 11.Nxh8+ Rxh8 12.a7 gxf3 13.a8Q f2 14.Ng3 Bh7 
  +/=  (0.34)   Depth: 22/63   00:07:03  4193MN, tb=1
1.Bxc5+ Kxc5 2.d4+ Kxd4 3.Nb5+ Kxe5 4.Nd3+ Kxf5 5.Nd4+ Kg6 6.Nf4+ Kg7 7.Nf5+ Kf8 8.Ng6+ Ke8 9.a6 Nd8+ 10.Kb6 Kf7 11.Nxh8+ Rxh8 12.a7 gxf3 13.a8Q f2 14.Ng3 Bh7 15.Qa7 
  +/=  (0.42)   Depth: 23/65   00:07:41  4594MN, tb=1
Default setting.
Stopped knowing from a trial before it would for sure take many more minutes again to see eval climb a little. Reason might be in output above 9.a6? instead of Kc8!
Showing this one 9th to Zappa it still needs quite a while or to be shown 13th Nc7! for mating score.

BTW it's a Martin van Essen 2004- study,
http://www.arves.org/arves/index.php/en ... artin-1980
6th one from above at the arves- site.
In HTC2020 it's nr. 91, istn't it?

In the thread you already gave a link to:
http://talkchess.com/forum3/viewtopic.p ... 61#p339461
Peter.
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alchemist888
Posts: 9
Joined: Fri Mar 29, 2019 3:02 pm
Full name: Denis S.

Re: Can any engine independently solve this puzzle?

Post by alchemist888 »

Pafifi wrote: ↑Thu Feb 27, 2020 4:05 am ... 21. a8=Q d2 22. Qc6#
21. a8=Q is not correct move! 21. a8=B!! :)
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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Can any engine independently solve this puzzle?

Post by zullil »

Pafifi wrote: ↑Thu Feb 27, 2020 4:05 am [pgn]
[FEN "6br/1KNp1n1r/2p2p2/P1ppRP2/1kP3pP/3PBB2/PN1P4/8 w - - 0 1"]
1. Bxc5+ Kxc5 2. d4+ Kxd4 3. Nb5+ Kxe5 4. Nd3+ Kxf5 5. Nd4+ Kg6 6. Nf4+ Kg7 7. Nf5+ Kf8 8. Ng6+ Ke8 9. Kc8 gxf3 10. a6 f2 11. a7 f1=Q 12. a8=N Qf4 13. Nc7+ Qxc7+ 14. Kxc7 dxc4 15. Kc8 c3 16. dxc3 c5 17. a4 d5 18. a5 c4 19. a6 d4 20. a7 d3 21. a8=Q d2 22. Qc6#
[/pgn]
Even Sting SF need the first move feed? Or how deep can it find the solution?
Ordinary Stockfish-dev will eventually find Bxc5+.

info depth 71 seldepth 103 multipv 1 score cp 9 lowerbound nodes 1860943065833 nps 49632496 hashfull 1000 tbhits 0 time 37494448 pv e3c5
info depth 70 currmove e3c5 currmovenumber 1
info depth 71 seldepth 103 multipv 1 score cp 19 lowerbound nodes 1867562052415 nps 49634359 hashfull 1000 tbhits 0 time 37626396 pv e3c5
info depth 69 currmove e3c5 currmovenumber 1
info depth 71 seldepth 103 multipv 1 score cp 34 lowerbound nodes 1875212675605 nps 49633529 hashfull 1000 tbhits 0 time 37781167 pv e3c5
info depth 68 currmove e3c5 currmovenumber 1
info depth 71 seldepth 103 multipv 1 score cp 54 lowerbound nodes 1881713439338 nps 49633046 hashfull 1000 tbhits 0 time 37912511 pv e3c5
info depth 67 currmove e3c5 currmovenumber 1
info depth 71 seldepth 103 multipv 1 score cp 81 lowerbound nodes 1889778750765 nps 49633493 hashfull 1000 tbhits 0 time 38074667 pv e3c5
info depth 66 currmove e3c5 currmovenumber 1
info depth 71 seldepth 103 multipv 1 score cp 117 lowerbound nodes 1894295080788 nps 49631560 hashfull 1000 tbhits 0 time 38167147 pv e3c5
info depth 65 currmove e3c5 currmovenumber 1
info depth 71 seldepth 103 multipv 1 score cp 165 lowerbound nodes 1897879542529 nps 49631462 hashfull 1000 tbhits 0 time 38239444 pv e3c5
info depth 64 currmove e3c5 currmovenumber 1
info depth 71 seldepth 135 multipv 1 score cp 226 lowerbound nodes 1923002961036 nps 49636977 hashfull 1000 tbhits 0 time 38741339 pv e3c5
info depth 63 currmove e3c5 currmovenumber 1
info depth 63 currmove e5e8 currmovenumber 2
info depth 63 currmove b7b6 currmovenumber 3
info depth 63 currmove a5a6 currmovenumber 4
info depth 63 currmove e5e6 currmovenumber 5
info depth 63 currmove e5e7 currmovenumber 6
info depth 63 currmove c7a6 currmovenumber 7
info depth 63 currmove a2a3 currmovenumber 8
info depth 63 currmove b7b8 currmovenumber 9
info depth 63 currmove c7e8 currmovenumber 10
info depth 63 currmove e3f2 currmovenumber 11
info depth 63 currmove b2a4 currmovenumber 12
info depth 63 currmove b7a6 currmovenumber 13
info depth 63 currmove c7e6 currmovenumber 14
info depth 63 currmove d3d4 currmovenumber 15
info depth 63 currmove e3h6 currmovenumber 16
info depth 63 currmove f3e2 currmovenumber 17
info depth 63 currmove e5e4 currmovenumber 18
info depth 63 currmove b7c8 currmovenumber 19
info depth 63 currmove f3d1 currmovenumber 20
info depth 63 currmove c7a8 currmovenumber 21
info depth 63 currmove f3e4 currmovenumber 22
info depth 63 currmove e3g5 currmovenumber 23
info depth 63 currmove c7b5 currmovenumber 24
info depth 63 currmove b2d1 currmovenumber 25
info depth 63 currmove a2a4 currmovenumber 26
info depth 63 currmove f3g2 currmovenumber 27
info depth 63 currmove e3g1 currmovenumber 28
info depth 63 currmove e3f4 currmovenumber 29
info depth 63 currmove h4h5 currmovenumber 30
info depth 63 currmove b7a7 currmovenumber 31
info depth 63 currmove f3h1 currmovenumber 32
info depth 63 currmove b7a8 currmovenumber 33
info depth 63 currmove e3d4 currmovenumber 34
info depth 63 currmove f3d5 currmovenumber 35
info depth 63 currmove e5d5 currmovenumber 36
info depth 63 currmove f3g4 currmovenumber 37
info depth 63 currmove c4d5 currmovenumber 38
info depth 63 currmove c7d5 currmovenumber 39
info depth 71 seldepth 135 multipv 1 score cp 210 nodes 1955472210978 nps 49653056 hashfull 1000 tbhits 0 time 39382716 pv e3c5 b4c5 d3d4 c5d4 c7b5 d4e5 b2d3 e5f5 b5d4 f5g6 d3f4 g6g7 d4f5 g7f8 f4g6 f8e8 a5a6 f7e5 f5d6 e8d8 a6a7 e5g6 a7a8q d8e7 d6f5 e7f7 f3g4 g6e5 g4d1 d5c4 d1c2 e5d3 a8a3 f7g6 f5e7 g6f7 c2d3 c4d3 a3d6 h7h4 e7f5 h4h5 d6d3 f7f8 d3d6 f8f7 d6d7 f7g6 f5e7 g6g7 a2a4 g8f7 e7c8 h5a5 c8d6 h8f8 d2d4 a5a4 d6f5 g7g6 f5e7 g6h6 d7d6 a4a8 d6f4 h6h5 f4f3 h5g5 f3f5 g5h6 f5f6 h6h5 f6f3 h5h4 f3e4 h4g3 e4e3 g3g4 b7c6 f7a2 e3e2 f8f3 d4d5 a2d5 e7d5 a8a3 e2g2 g4f5 g2g7 a3a6 c6b5 f3a3 d5e7 f5f4 e7c6 f4e3 g7e5 e3f3 c6d4 f3g4 e5e2 g4h4 e2e1 h4g5 e1e4 g5h5 d4c6 a6a4 c6b4 a4a5 b5c6 a5a4 e4e5 h5g4
info depth 72 currmove e3c5 currmovenumber 1
info depth 72 seldepth 88 multipv 1 score cp 221 lowerbound nodes 1967535892725 nps 49658171 hashfull 1000 tbhits 0 time 39621594 pv e3c5
info depth 71 currmove e3c5 currmovenumber 1
info depth 72 seldepth 88 multipv 1 score cp 231 lowerbound nodes 1990602921094 nps 49659832 hashfull 1000 tbhits 0 time 40084769 pv e3c5
info depth 70 currmove e3c5 currmovenumber 1
info depth 72 seldepth 92 multipv 1 score cp 246 lowerbound nodes 2005989899219 nps 49659099 hashfull 1000 tbhits 0 time 40395213 pv e3c5
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