[gtp] No I?

[Gunnar Farnebäck]

Chris wrote:
> I suppose this may be explained somewhere, but I've been at a lose to 
> discover it. Why do GTP coordinates not use the letter I? SGF uses I, or 
> at least doesn't mention it explicitly 
> (http://www.red-bean.com/sgf/go.html). Most non-GTP go board markups 
> I've seen use I. Sensei's Library lists some answers to this question, 
> but they seem fairly vague and inconclusive. Is there a real reason or 
> is it just convention?

It's traditional in computer go, see for example major go servers like
IGS, KGS, NNGS. Except for sgf I don't know an example where 'I' is
included. Even the GMP specification excludes it, although it's of no
real importance there.

Don wrote:
> Of course you probably realize  that the letter 'I' is easily confused
> with the letter 'J' and is avoided in the game of Go for this reason.

And 'l'.

/Gunnar