Variable: gametree-half-ply-format
gametree-half-ply-format is a customizable variable defined in
gametree.el.gz.
Value
"%d:"
Documentation
Output format for move numbers of moves by the "second" player.
Has to contain "%d" to output the actual number.
Source Code
;; Defined in /usr/src/emacs/lisp/play/gametree.el.gz
(defcustom gametree-half-ply-format "%d:"
"Output format for move numbers of moves by the \"second\" player.
Has to contain \"%d\" to output the actual number."
:type 'string)