bugXBoard - Bugs: bug #18687, Check reported instead of a mate

 
 

bug #18687: Check reported instead of a mate

Submitter:  None
Submitted:  Thu 04 Jan 2007 03:06:44 PM UTC
   
 
Category:  None Severity:  3 - Normal
Item Group:  None Status:  Fixed
Assigned to:  None Open/Closed:  Closed
Release:  None
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Sat 27 Jun 2009 11:01:21 PM UTC, comment #2: 

This has been fixed in the xboard 4.3.x series and the 4.4.0 which we are working on.

Arun Persaud <apersaud>
Group administrator
Thu 04 Jan 2007 06:30:53 PM UTC, comment #1: 

This happens because of a documented limitation: xboard doesn't check whether possible en passant captures are actually legal (i.e., whether or not the pawn to be captured just moved).  In the given game, the illegal en passant capture cxd3 would block the check, so xboard thinks the position is not mate yet.

Tim Mann <mann>
Group administrator
Thu 04 Jan 2007 03:06:44 PM UTC, original submission:  

Here is the pgn. Last move is mate not check.

[Event "Edited game"]
[Site "david"]
[Date "2007.01.04"]
[Round "-"]
[White "-"]
[Black "-"]
[Result "*"]

1. d4 e6 2. e3 b6 3. e4 Bb7 4. f3 h6 5. c4 Bb4+ 6. Bd2 Bxd2+ 7. Qxd2 Ne7 8.
Nc3 f5 9. Bd3 O-O 10. O-O-O f4 11. Nge2 g5 12. h4 d5 13. hxg5 hxg5 14. g3
Ng6 15. e5 Ne7 16. gxf4 dxc4 17. Bh7+ Kg7 18. fxg5 Bxf3 19. Rdf1 Bxh1 20.
Nf4 Bd5 21. Ncxd5 Nxd5 22. Nxe6+ Kxh7 23. Rxf8 Qe7 24. Qc2+
*


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    Follow 4 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2009-06-27 apersaud StatusNone Fixed
        Open/ClosedOpen Closed
    2008-08-11 mann Attached File#16268 Removed
    2008-08-10 None Attached File- Added bg.jpg, #16268

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