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?
Chris
GTP was designed specifically for Go. Go doesn't use the letter "I" and GTP uses the same notation that humans use for recording or specifying moves.
SGF is a generic format for recording board games in general and is not specific to Go. SGF doesn't use Go notation.
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.
- Don
From: Chris Spencer ckspencer@verizon.net
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?
Chris
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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
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Chris Spencer -
Don Dailey -
Gunnar Farneb�ck