Re: Bug in GNU Chess

[Simon Waters]

On Sunday, 30 June 2019 10:12:33 BST Adhokshaj Mishra wrote:
> Hello,
> While playing Chess via Knights GUI around GNU Chess engine, I
> stumbled upon a possible bug where GNU Chess just keeps churning the CPU,
> and does not return a valid move from computer's side. I have attached a
> screenshot of board, as well as history of moves from both sides.
>
> Please feel free to let me know if you need some additional
> information/debugging/testing from my side.

Thanks for the report.

Could you let us know the version of gnuchess in use. (Usually "gnuchess -v"
or simply typing "gnuchess" in a terminal window will get this information).

Also I assume this is the version packaged with a distro, can you let us know
distro and version.

I turned position in to epd
r3kb1r/pppb1ppp/2n2n2/1P3q2/2P5/P3Pp1P/3P1PP1/R1BQKB1R b Kkq - bm 1; id 1;

I'm unable to persuade the stock GNU Chess on Debian (6.2.5) to crash from
this position with a few likely tries, it wants to play fxg2 when it is
confident it will go on to improve its position.

It can sometimes be hard to reproduce a specific crash from a game, as it can
depend on time controls, or may be something outside of the program.

[Adhokshaj Mishra]

Hi,

My apologies for sending incomplete information. Please find requested information as below:

 

OS: Arch Linux x86_64 (5.1.15-arch1-1-ARCH)

GNUChess version: 6.2.5

GUI used: KNights 2.6.0

 

> I'm unable to persuade the stock GNU Chess on Debian (6.2.5) to crash from

> this position with a few likely tries, it wants to play fxg2 when it is

> confident it will go on to improve its position.

 

GNU Chess hangs, with 1 or 2 CPU cores at 80-100% load, and does not return any move at all while GUI is waiting for it to respond.

 

--

Regards,

Adhokshaj Mishra

[Antonio Ceballos]

Hi,

A recent possible bug in GNU Chess has led me to raise a question on the problem you found.

When you use GNU Chess from Knights, do you run it in UCI mode or default mode?

For UCI mode, you start the program as

gnuchess -u

or

gnuchess --uci

For default mode, you just type the program name with no argument.

On the other hand, if you are somehow manage to play the same game, will it hang on the same position?

Regards,

Antonio Ceballos

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[Adhokshaj Mishra]

Hi,

Knights is starting GNU Chess in default mode. I will try to reproduce the same moves and will let you know.

 

--

Regards,

Adhokshaj Mishra