illegal FEN error from Gaviota

stevemulligan · Post by **stevemulligan** » Fri Oct 21, 2011 5:28 pm

I'm trying to use Gaviota to give me a score for a certain position (64-bit linux v0.84)

setboard rn2kbnr/ppp2ppp/8/8/2PP4/2K5/PPq2P1P/RNBb4 b kq -
Error &#40;wrong FEN or EPD&#41;&#58; rn2kbnr/ppp2ppp/8/8/2PP4/2K5/PPq2P1P/RNBb4 b kq -
tellusererror Error loading FEN&#58;
rn2kbnr/ppp2ppp/8/8/2PP4/2K5/PPq2P1P/RNBb4 b kq -

The real position is actually with white to move but I flipped over to blacks move just to see what the score would be and I got this error and I'm not sure why.

This works fine:

Code: Select all

setboard rn2kbnr/ppp2ppp/8/8/2PP4/2K5/PPq2P1P/RNBb4 w kq -

(position was taken from GiuocoPiano.pgn)

Evert · Post by **Evert** » Fri Oct 21, 2011 7:08 pm

Ehm... did you actually look at the position?

Hint: look at the position of the white king and the black queen.

stevemulligan · Post by **stevemulligan** » Fri Oct 21, 2011 7:19 pm

Evert wrote:Ehm... did you actually look at the position?

ha thanks. It can't be blacks move because that would mean white had just moved into check. Makes sense now.

michiguel · Post by **michiguel** » Fri Oct 21, 2011 11:22 pm

stevemulligan wrote:
Evert wrote:Ehm... did you actually look at the position?
ha thanks. It can't be blacks move because that would mean white had just moved into check. Makes sense now.

Gaviota is very picky about FEN input, to avoid positions that make it crash.

It has a bonus for side to move, which is close to ~11 centipawns, IIRC. You will notice probably this difference is you flip sides (2 * 11, actually).

Miguel

illegal FEN error from Gaviota

illegal FEN error from Gaviota

Re: illegal FEN error from Gaviota

Re: illegal FEN error from Gaviota

Re: illegal FEN error from Gaviota