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| -rw-r--r-- | chess.texi | 10 |
1 files changed, 10 insertions, 0 deletions
@@ -121,12 +121,19 @@ Chess puzzles are most often provided as a set of positions. @subsection Position coordinates +First of all, a coordinate system of octal indices is +used, where ?\044 signifies rank 4 file 4 (i.e., "e4"). Rank is +numbered 0 to 7, top to bottom, and file is 0 to 7, left to right. + @c lispfun chess-index-rank @c lispfun chess-index-file @c lispfun chess-rf-to-index +For those who wish to use ASCII coordinates, such as "e4", there +are two conversion functions: + @c lispfun chess-coord-to-index @c lispfun chess-index-to-coord @@ -135,6 +142,9 @@ Chess puzzles are most often provided as a set of positions. @subsection Position details +With an octal index value, you can look up what's on a particular +square, or set that square's value: + @c lispfun chess-pos-piece @c lispfun chess-pos-piece-p |