Re: [gnugo-devel] eyespace reading

[Gunnar Farneback]

George wrote:
> I restrict the considtion
> 
> optics.c
> 
> +1698         || eye[pos].neighbors > 2 || eye[pos].neighbors > 1 &&
> !is_edge_vertex(pos))
> -1698         || eye[pos].neighbors > 1)

This has quite big effects on the regressions, 28 PASS / 40 FAIL, see
http://trac.gnugo.org/gnugo/ticket/184 and the details at the bottom of
http://trac.gnugo.org/gnugo/regressiontest

> By the way, the amend above can solve position like
> 
> (;AB[be][bc][cc][dc][ec][fc][hc][gb]AW[ab][bb][cb][db][eb]SZ[19]GM[1]CA[UTF-
> 8]FF[4])
>  
> That is,
> 
> +------------------------------
> |........
> |OOOOO.X.
> |.XXXXX.X
> 
> yields 1-1-2-2 instead of 1-2-2-2 before amendation.
> 
> Ya, it is tricky.

I think the only way to make significant progress with the optics code
is to introduce (shallow) reading. It's not at all obvious how to do
that efficiently, so it would be a major project.

/Gunnar