;;; Code:
(require 'chess-common)
+(require 'chess-polyglot)
+
+(defgroup chess-uci nil
+ "Customisations for Chess engines based on the UCI protocol"
+ :group 'chess)
+
+(defcustom chess-uci-polyglot-book-file nil
+ "The path to a polyglot binary opening book file."
+ :group 'chess-uci
+ :type '(choice (const :tag "Not specified" nil) file))
+
+(defvar chess-uci-book nil
+ "A (polyglot) opening book object.
+See `chess-uci-polyglot-book-file' for details on how to enable this.")
(defvar chess-uci-long-algebraic-regexp "\\([a-h][1-8]\\)\\([a-h][1-8]\\)\\([nbrq]\\)?"
"A regular expression matching a UCI log algebraic move.")
"Default handler for UCI based engines."
(unless chess-engine-handling-event
(cond
+ ((eq event 'initialize)
+ (when chess-uci-polyglot-book-file
+ (unless chess-uci-book
+ (setq chess-uci-book (chess-polyglot-book-open
+ chess-uci-polyglot-book-file))))
+ (apply #'chess-common-handler game event args))
+
((eq event 'move)
(when (= 1 (chess-game-index game))
(chess-game-set-tag game "White" chess-full-name)
(chess-game-set-tag game "Black" chess-engine-opponent-name))
- (chess-engine-send nil (concat (chess-uci-position game) "go\n"))
+ (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 ((chess-display-handling-event nil))
+ (funcall chess-engine-response-handler 'move (car book-plies)))
+ (chess-engine-send nil (concat (chess-uci-position game) "go\n"))))
+
(if (chess-game-over-p game)
(chess-game-set-data game 'active nil)))