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This item is a play-by-email page
It belongs to categories: Orthodox chess, 
It was last modified on: 2001-01-01
 Author: Fergus  Duniho and Antoine  Fourrière. Inventor: David  Short. Double Chess. FIDE Chess x 2(with extra queen replacing what would be an extra king).[All Comments] [Add Comment or Rating]
Greg Strong wrote on 2020-09-02 UTC

I just tested this preset and it seems to mostly work. I tried all four castlings (king-side and queen-side, close-rook and far-rook) and they all worked. Moves often weren't displayed correctly, though. Queen-side castling with the close rook displays and works fine. King-side castling with the close rook does not display as legal, but it will work if you tell it to try anyway. King-side castling with the far rook does not display but will work. Queen-side castling with the far rook (a) does not display the legal move, but it will work anyway, and (b) displays a king move to the g-file as legal that should not work, but does.

Kevin also previously noted a castling in a real game that should have worked but didn't. This is Antoine's preset and he is no longer active. I will try to look at it in a few days if no one else does, but it would be great if someone else could take a look.


Kevin Pacey wrote on 2019-05-19 UTC

Note I reported a bug long, long ago, in this Double Chess preset thread, which came up in a game of mine (I gave a link to that log); IIRC it had to do with legally castling not being allowed in that game of mine. I don't know if the bug was ever fixed.


Kevin Pacey wrote on 2018-03-12 UTC

I discovered Greg Strong has made a (unofficial!?) non-rules enforcing preset for this game that can be found by going thru GC's list of 1000+ presets. That would seem to save the day for playing this variant, as this rules enforcing preset here has a bug re: castling, apparently, as I noted in a previous post.


Kevin Pacey wrote on 2018-02-13 UTC

This preset seems to have bug(s), in that as Black I was apparently not allowed to legally perform inside castling as Black (that is, at my first chance to do so):

/play/pbm/play.php?game=Double+Chess&log=panther-cvgameroom-2018-37-898


James Spratt wrote on 2006-01-29 UTCExcellent ★★★★★
David Short's DOUBLE CHESS is a TERRIFIC game. It gets intense in a hurry and stays that way.

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