chess-uci: Choose a (random) move from the book.

[gnu-emacs-elpa] / chess-uci.el

diff --git a/chess-uci.el b/chess-uci.el
index 2413cd84d3565c4c7b373ad98cfd9942f5d04275..ad6852c492bad12575f9e93a251cd301d47fce1c 100644 (file)
--- a/chess-uci.el
+++ b/chess-uci.el
@@ -119,13 +119,13 @@ If conversion fails, this function fired an 'illegal event."
        (chess-game-set-tag game "White" chess-full-name)
        (chess-game-set-tag game "Black" chess-engine-opponent-name))
 
-      (let ((book-plies (and chess-uci-book (bufferp chess-uci-book)
-                            (buffer-live-p chess-uci-book)
-                            (chess-polyglot-book-plies chess-uci-book
-                                                       (chess-game-pos game)))))
-       (if book-plies
+      (let ((book-ply (and chess-uci-book (bufferp chess-uci-book)
+                          (buffer-live-p chess-uci-book)
+                          (chess-polyglot-book-ply chess-uci-book
+                                                   (chess-game-pos game)))))
+       (if book-ply
            (let ((chess-display-handling-event nil))
-             (funcall chess-engine-response-handler 'move (car book-plies)))
+             (funcall chess-engine-response-handler 'move book-ply))
          (chess-engine-send nil (concat (chess-uci-position game) "go\n"))))
 
       (if (chess-game-over-p game)