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What engine can see the best move Bf8+!
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Gary



Joined: 12 Dec 2006
Posts: 349
PostPost subject: Re: What engine can see the best move Bf8+!    Posted: Wed Apr 11, 2012 12:16 pm Reply to topic Reply with quote
pichy wrote:
This is where top GMs are superior to top engines in long term calculation and able to detect a position that will lead the human to win at the end by forcing Black into a Horizon effect in which Black will not be able to get out off.

Very nice position!

Stockfish currently can't find it within reasonable time, but, with this patch: https://github.com/glinscott/Stockfish/compare/pinned_null, here is how it looks. The change was pretty minor. Adding a bonus when a friendly piece is blocking check to the enemy king, and not allowing null move pruning for the enemy in that situation. Whether it ends up increasing ELO or not is a separate question Smile.

Code:

Analysis by Stockfish 120410 64bit 326 64bit:

1.Rf8 Qg3+ 2.Kf1 Qh3+ 3.Ke1 Qe6 4.Bxf4+ Kg6
  ³  (-0.40)   Depth: 4/7   00:00:00
...
1.Rf8 Qe1 2.Bxf4+ Kg7 3.Re8 Kf7 4.Re4 Kg6 5.Bd6 Kf6 6.Be5+ Kf5 7.Bd6 h4 8.Re5+ Kg6
9.Re6+ Kf7 10.Re4 Kg6 11.Re6+
  =  (0.00)   Depth: 18/36   00:00:00  1190kN
...
1.Rf8 Qe1 2.Bxf4+ Kg7 3.Re8 Kf7 4.Re4 Kg6 5.Bd6 Kf6 6.Be5+ Kg6 7.Bd6
  =  (0.00)   Depth: 32/45   00:00:37  82483kN
1.Bf8+ Kh7 2.Rg7+ Kh8 3.Be7 Qe1 4.Bf6 Qc1 5.Kh2 Qc2 6.Ba1 Qc4 7.Bb2 Qc2 8.Bf6 Qf5
9.Ba1 Qc2 10.Kh1 Qc4 11.e4 h4 12.Bf6 h3 13.Ba1 h2 14.Bf6 Qe6 15.e5
  =  (0.08)   Depth: 33/45   00:00:40  126mN
...
1.Bf8+ Kh7 2.Rg7+ Kh8 3.Be7 Qe1 4.Bf6 Qxe2+ 5.Kh1 Qe6 6.Bd4 Qc4 7.Ba1 h4 8.Bf6 Qe6
9.Bd4 Qc4 10.Ba1 h3 11.Bf6 Qe6 12.Bd4 Qc4 13.Ba1 h2 14.Bf6 Qe6 15.Bd4 Qh6 16.Rg6+ Kh7
  +-  (13.25)   Depth: 36/67   00:01:15  229mN
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Subject Author Date/Time
What engine can see the best move Bf8+! Jorge Pichard Tue Apr 10, 2012 6:51 am
      Re: What engine can see the best move Bf8+! Robert Houdart Tue Apr 10, 2012 9:18 am
            Re: What engine can see the best move Bf8+! Jorge Pichard Tue Apr 10, 2012 11:16 pm
                  Re: What engine can see the best move Bf8+! om prakash Thu Apr 12, 2012 6:46 pm
            Re: What engine can see the best move Bf8+! Dan Andersson Wed Apr 11, 2012 1:07 am
                  Re: What engine can see the best move Bf8+! Jorge Pichard Wed Apr 11, 2012 1:52 am
                        Re: What engine can see the best move Bf8+! Sam Hamilton Wed Apr 11, 2012 3:37 am
                              Re: What engine can see the best move Bf8+! Jorge Pichard Wed Apr 11, 2012 8:21 am
                                    Re: What engine can see the best move Bf8+! Sam Hamilton Wed Apr 11, 2012 12:47 pm
                                          Re: What engine can see the best move Bf8+! Jorge Pichard Wed Apr 11, 2012 5:10 pm
                                                Re: What engine can see the best move Bf8+! Sam Hamilton Thu Apr 12, 2012 12:44 am
                                                      Re: What engine can see the best move Bf8+! Jorge Pichard Thu Apr 12, 2012 1:33 am
            Re: What engine can see the best move Bf8+! kgburcham Wed Apr 11, 2012 3:07 am
            Re: What engine can see the best move Bf8+! Ernest Bonnem Wed Apr 11, 2012 2:49 pm
            Re: What engine can see the best move Bf8+! Uri Zlatnik Thu Apr 12, 2012 1:56 am
                  Re: What engine can see the best move Bf8+! Jorge Pichard Thu Apr 12, 2012 2:12 am
                  Re: What engine can see the best move Bf8+! Ernest Bonnem Thu Apr 12, 2012 7:54 am
                        Re: What engine can see the best move Bf8+! Uri Zlatnik Thu Apr 12, 2012 8:05 am
                        Re: What engine can see the best move Bf8+! Jorge Pichard Thu Apr 12, 2012 12:20 pm
                              Re: What engine can see the best move Bf8+! Uri Zlatnik Thu Apr 12, 2012 1:24 pm
                                    Re: What engine can see the best move Bf8+! Jorge Pichard Thu Apr 12, 2012 2:58 pm
                                          Re: What engine can see the best move Bf8+! Matthew R. Brades Thu Apr 12, 2012 5:05 pm
                                                Re: What engine can see the best move Bf8+! Jorge Pichard Thu Apr 12, 2012 5:15 pm
                                                      Re: What engine can see the best move Bf8+! Martin Hertz Thu Apr 12, 2012 5:58 pm
                                                      Re: What engine can see the best move Bf8+! Tano-Urayoan Russi Roman Thu Apr 12, 2012 8:14 pm
                                                            Re: What engine can see the best move Bf8+! Jorge Pichard Thu Apr 12, 2012 9:45 pm
                                                            Re: What engine can see the best move Bf8+! Jorge Pichard Thu Apr 12, 2012 9:45 pm
                                                            Re: What engine can see the best move Bf8+! Graham Banks Thu Apr 12, 2012 9:53 pm
                                                                  Re: What engine can see the best move Bf8+! Marek Kwiatkowski Fri Apr 13, 2012 10:14 am
                                                                        Re: What engine can see the best move Bf8+! Gary Fri Apr 13, 2012 2:08 pm
                                                                              Re: What engine can see the best move Bf8+! Marek Kwiatkowski Fri Apr 13, 2012 7:17 pm
                                                                                    Re: What engine can see the best move Bf8+! Gary Sat Apr 14, 2012 2:10 am
                                                                        Re: What engine can see the best move Bf8+! Marek Kwiatkowski Fri Apr 13, 2012 3:28 pm
                                                                              Re: What engine can see the best move Bf8+! Jorge Pichard Sat Apr 14, 2012 1:39 am
                                                                                    Re: What engine can see the best move Bf8+! Lucas Braesch Sat Apr 14, 2012 6:41 am
                                                                                          Re: What engine can see the best move Bf8+! Jorge Pichard Sat Apr 14, 2012 7:19 am
                                                                                          Re: What engine can see the best move Bf8+! Jorge Pichard Sat Apr 14, 2012 6:44 pm
            Re: What engine can see the best move Bf8+! Jorge Pichard Sun Apr 22, 2012 11:33 pm
      Re: What engine can see the best move Bf8+! Louis Zulli Tue Apr 10, 2012 10:21 am
            Re: What engine can see the best move Bf8+! Andrea Sorcinelli Tue Apr 10, 2012 11:41 am
                  Re: What engine can see the best move Bf8+! Zlatin Stoyanov Tue Apr 10, 2012 12:13 pm
                        Re: You don't consider Komodo and Hannibal Modern Engines ? Jorge Pichard Tue Apr 10, 2012 12:52 pm
                              Re: You don't consider Komodo and Hannibal Modern Engines ? Jorge Pichard Tue Apr 10, 2012 7:05 pm
                        Re: What engine can see the best move Bf8+! Louis Zulli Tue Apr 10, 2012 8:03 pm
      Re: What engine can see the best move Bf8+! Jesús Muñoz Wed Apr 11, 2012 11:07 am
      Re: What engine can see the best move Bf8+! Gary Wed Apr 11, 2012 12:16 pm
            Re: What engine can see the best move Bf8+! Jorge Pichard Thu Apr 12, 2012 12:10 am
                  Re: Can you make this version available for more testing ? Jorge Pichard Thu Apr 12, 2012 4:54 pm
                        Re: Can you make this version available for more testing ? Gary Fri Apr 13, 2012 3:20 pm
                              Re: Can you make this version available for more testing ? Jorge Pichard Sat Apr 14, 2012 12:57 am
                                    Re: Can you make this version available for more testing ? Gary Sat Apr 14, 2012 2:12 am
      Re: Komodo Finally solve this position Jorge Pichard Mon Apr 23, 2012 9:06 pm
            Re: Komodo Finally solve this position Jorge Pichard Thu Apr 26, 2012 11:04 am
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