Re: I made gnuchess freak out

[Simon Waters]

Timothy Ball wrote:
> 
> 1. d4 Nf6 2. Nc3 e6 3. Nf3 Bb4 4. a3 Bxc3+ 5. bxc3 O-O 6. e3 d5 7. Ne5 Ne4
> 8. Ng4 Nxc3 9. Qd3 Ne4 10. c4 Nc6 11. Bb2 f5 12. Ne5 Nxe5 13. dxe5 f4 14.
> exd6
> *

Thanks for the bug report.

14. exd6 is an illegal move as "en passant" capture is only
allowed on the move immediately after a pawn advances two
squares.

However the combination of GNU Chess and xboard should detect
this illegal move and object rather than just hanging. It looks
like the communication breaks down between the programs, I will
investigate further, and resolve.

Reproduced Xboard 4.2.4 + GNU Chess 5.03, different pawn
position, same theme.