🚀 go-pugleaf

In article <19ML5.115383$JS3.17959784@typhoon.nyroc.rr.com>, "Stephen C 
Morgana" <nospam@nospam.nohow> wrote:

> Hi,
> 
> I've encountered a bug in GNU Chess 5.0 on a Sun Sparc Solaris platform 
>...
> The problem occurred on move 9 ... Nc6xb5  where it explicitly moved a
> knight diagonally to capture.  I did not notice the problem (was making
> moves in between editing/compiling stuff) until move 12 ... b8c6 produced 
> no
> visible difference in the board (since b8 was an empty square).

In the rules of chess, you must challange the illegal move before your 
play otherwise the move stands. An exception is if an inconcistancy is 
discovered that prevents further play like a king is missing. It does 
sound like there is a bug in xboard that doesn't handle the situation.

GNU Chess should be carefull where it uses this tactic since there is 
usually a severe time penalty when it is caught.

-- Dan Oetting