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This is an interesting form of chess with more possibilities
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Jorge Pichard



Joined: 09 Mar 2006
Posts: 2558
PostPost subject: Re: This is an interesting form of chess with more possibili    Posted: Sat May 12, 2012 9:04 am Reply to topic Reply with quote
hgm wrote:
Daniel Shawul wrote:
If you decide to support games with protruding squares (islands), I use the symbol '*' to represent them. For Omegachess the FEN I use is

a**********a/1crnbqkbnrc1/*pppppppppp*/*10*/*10*/*10*/*10*/*10*/*10*/*PPPPPPPPPP*/1CRNBQKBNRC1/A**********A w - - 0 1

Maybe there is a better solution than this like sending playable squares only. Assuming rectangular board causes unnecessary information exchange . May be it is even better to be straight forward as possible and avoid FEN all in all. At each step, the gui could send the squares where pieces exist. The playbable squares are sent only once so at the start of the game. Such kind of format is used in past google ai challenge (and even before that), so that they won't have to rewrite the code for every game they invent for the competions.


Note that you have not been entirely consistent, because the non-existing squares on the piece row are indicated as empty squares in the FEN you give, rather than as *. This could reflect a true error in your board setup.

The FEN format does present a bit of a problem. For an Omega-Chess user it would be very annoying having to handle all the asterisk every time. OTOH, in the WB setup command the board format has to be specified in detail, as WB will in general will not know which board squares are inaccessible. So leaving out inaccessible squares, or denoting them as empty squares (to allow contraction, ********** = 10, *10* = 12) would not work in the setup command.

Perhaps we would have to introduce a dual standard here. The setup command would have to explicitly indicate inaccessible squares by asterisk, like in the format you propose. But when a FEN is encountered that does not include any asterisks, and for which the length of the ranks is not equal to the current board width, the FEN decoding would skip squares that are currently marked as inaccessible on the internal board. In general it is not possible to decode FENs without prior knowledge (like pieceToCharTable), so FENs in loaded PGNs can only be decoded after the GUI has seen the setup command from the engine, which would load the standard board setup, and thus mark inaccessible squares.

In the setboard command we could then use the format including asterisks, to make life easier for multi-variant engines.


You can use this version of Omega Chess using the two extra pieces on the Bipmap, you don't have to reinvent the wheel Wink
http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=50961
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Subject Author Date/Time
This is an interesting form of chess with more possibilities Jorge Pichard Fri May 11, 2012 5:07 am
      Re: This is an interesting form of chess with more possibili Joel Martus Fri May 11, 2012 6:34 am
            Re: This is an interesting form of chess with more possibili H.G.Muller Fri May 11, 2012 6:55 am
                  Re: This is an interesting form of chess with more possibili Jorge Pichard Fri May 11, 2012 1:49 pm
                        Re: This is an interesting form of chess with more possibili Daniel Shawul Fri May 11, 2012 1:52 pm
                              Re: This is an interesting form of chess with more possibili Jorge Pichard Fri May 11, 2012 2:19 pm
                                    Re: This is an interesting form of chess with more possibili H.G.Muller Fri May 11, 2012 2:25 pm
                                          Re: Here is a Winboard Supporr for Omega Chess.............. Jorge Pichard Fri May 11, 2012 3:29 pm
                                                Re: Here is a Winboard Supporr for Omega Chess.............. Daniel Shawul Fri May 11, 2012 4:58 pm
                                          Re: This is an interesting form of chess with more possibili Daniel Shawul Fri May 11, 2012 5:08 pm
                                                Re: This is an interesting form of chess with more possibili Jorge Pichard Fri May 11, 2012 5:57 pm
                                                Re: This is an interesting form of chess with more possibili H.G.Muller Sat May 12, 2012 6:40 am
                                                      Re: This is an interesting form of chess with more possibili Jorge Pichard Sat May 12, 2012 9:04 am
                                                            Re: This is an interesting form of chess with more possibili H.G.Muller Sat May 12, 2012 9:27 am
                                                            Re: This is an interesting form of chess with more possibili Daniel Shawul Sat May 12, 2012 11:46 am
                                                                  Re: This is an interesting form of chess with more possibili Jorge Pichard Sat May 12, 2012 12:51 pm
                                                                        Re: This is an interesting form of chess with more possibili Daniel Shawul Sat May 12, 2012 11:12 pm
                                                                              Re: This is an interesting form of chess with more possibili Jorge Pichard Sun May 13, 2012 2:47 pm
                                                                                    Re: This is an interesting form of chess with more possibili Miguel A. Ballicora Sun May 13, 2012 3:17 pm
                                                                  Re:A DanOmegaChess version could be close to 2630! Jorge Pichard Sat May 12, 2012 5:34 pm
                                                                        Re:A DanOmegaChess version could be close to 2630! Daniel Shawul Sat May 12, 2012 6:02 pm
                                                      Re: This is an interesting form of chess with more possibili Daniel Shawul Sat May 12, 2012 11:32 am
                                          Re: This is an interesting form of chess with more possibili Evert Glebbeek Fri May 11, 2012 6:46 pm
                                                Re: You almost have all the versions of chess except Omega Jorge Pichard Fri May 11, 2012 8:26 pm
                                                Re: This is an interesting form of chess with more possibili Evert Glebbeek Sat May 12, 2012 3:06 pm
                                                      Re: This is an interesting form of chess with more possibili Jorge Pichard Sat May 12, 2012 5:26 pm
                                                      Re: This is an interesting form of chess with more possibili Daniel Shawul Sat May 12, 2012 6:04 pm
                                                            Re: This is an interesting form of chess with more possibili Jorge Pichard Sat May 12, 2012 6:33 pm
      Re: This is an interesting form of chess with more possibili Jorge Pichard Fri May 11, 2012 6:25 pm
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