ChessUSA.com TalkChess.com
Hosted by Your Move Chess & Games
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

What engine can see the best move Bf8+!
Post new topic    TalkChess.com Forum Index -> Computer Chess Club: General Topics Flat
View previous topic :: View next topic  
Author Message
Robert Houdart



Joined: 15 Mar 2010
Posts: 1251
PostPost subject: Re: What engine can see the best move Bf8+!    Posted: Tue Apr 10, 2012 9:18 am Reply to topic Reply with quote
[D]6R1/8/2pB3k/2P4p/5p1q/5P2/4P1K1/8 w - - 0 1
   ::    ::    :: WR ::
::    ::    ::    ::    
   :: BP WB    ::    BK
::    WP    ::    :: BP
   ::    ::    BP    BQ
::    ::    :: WP ::    
   ::    :: WP :: WK ::
::    ::    ::    ::    

Jorge, interesting position. It's actually not about "horizon effect" or "superiority in long term calculation", this is a zugzwang problem which may cause a problem to engines because of null moves.
Here's Houdini's take, using 3 threads on a Core i5-750:
Code:
6R1/8/2pB3k/2P4p/5p1q/5P2/4P1K1/8 w - -

Engine: Houdini DEV 3T (2048 MB)
by Robert Houdart

4/14   0:00   0.00     1.Be5 Kh7 2.Rg7+ Kh6 3.Rg8 Kh7 (1.369)
...
11/24  0:00   -0.14    1.Rf8 Qe1 2.Bxf4+ Kg6 3.Re8 Qc3
                       4.Bd6 Qc4 5.Re4 Qa2 6.Kf2 Kf5 7.Re5+ Kg6 (98.576) 3520
...
22/43  0:02   0.00     1.Rf8 Qe1 2.Bxf4+ Kg6 3.Re8 Qc3
                       4.Bd6 Qc4 5.e4 Qe2+ 6.Kg3 Qe1+ 7.Kg2 Qe3
                       8.Re6+ Kf7 9.Re7+ Kf6 10.Re5 Qe2+
                       11.Kg3 Qe1+ 12.Kg2 Qd2+ 13.Kg3 Kg6
                       14.Re6+ (14.155.617) 6553
...
32/59  0:39   0.00     1.Rf8 Qe1 2.Bxf4+ Kg6 3.Re8 Qc3
                       4.Bd6 Qc4 5.e4 Qe2+ 6.Kg3 Qe1+ 7.Kg2 Qe3
                       8.Re6+ Kf7 9.Re7+ Kf6 10.Re5 Qe2+
                       11.Kg3 Qe1+ 12.Kf4 Qc1+ 13.Kg3 Qg1+
                       14.Kf4 (275.723.867) 6897

32/60  0:52   +0.04++  1.Bf8+ (364.867.951) 6992

32/60  0:54   +0.14++  1.Bf8+ (380.915.045) 7013

32/64  0:56   +0.37++  1.Bf8+ (399.304.568) 7033

32/66  0:59   +1.17++  1.Bf8+ (422.345.062) 7056

32/66  1:04   +4.25++  1.Bf8+ (455.314.294) 7102

32/79  1:49   +12.34++ 1.Bf8+ (858.348.298) 7844

32/81  1:50   +12.31   1.Bf8+ Kh7 2.Rg7+ Kh8 3.Be7 Qe1
                       4.Bf6 Qxe2+ 5.Kh1 Qc4 6.Ba1 h4 7.Bf6 Qe6
                       8.Bd4 Qc4 9.Ba1 h3 10.Bf6 Qe6 11.Bd4 Qh6
                       12.Rg6+ Kh7 13.Rxh6+ Kxh6 14.Kh2 (871.642.788) 7852

33/81  1:53   +12.31   1.Bf8+ Kh7 2.Rg7+ Kh8 3.Be7 Qe1
                       4.Bf6 Qxe2+ 5.Kh1 Qc4 6.Ba1 h4 7.Bf6 Qe6
                       8.Bd4 Qc4 9.Ba1 h3 10.Bf6 Qe6 11.Bd4 Qh6
                       12.Rg6+ Kh7 13.Rxh6+ Kxh6 14.Kh2 (895.335.546) 7862

How many human players would find a win in this position in less than a minute?
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
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
Post new topic    TalkChess.com Forum Index -> Computer Chess Club: General Topics

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum




Powered by phpBB © 2001, 2005 phpBB Group
Enhanced with Moby Threads