(incomplete) support for the stockfish engine.

1 files changed, 69 insertions, 0 deletions

diff --git a/chess-stockfish.el b/chess-stockfish.el
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+;;; chess-stockfish.el --- Play against stockfish!
+
+;; Copyright (C) 2014  Free Software Foundation, Inc.
+
+;; Author: Mario Lang <mlang@delysid.org>
+;; Keywords: games
+
+;; This file is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; This file is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING.  If not, write to
+;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Code:
+
+(require 'chess-uci)
+
+(defgroup chess-stockfish nil
+  "The publically available chess engine 'stockfish'."
+  :group 'chess-engine
+  :link '(url-link "http://www.stockfishchess.com"))
+
+(defcustom chess-stockfish-path (executable-find "stockfish")
+  "*The path to the stockfish executable."
+  :type 'file
+  :group 'chess-stockfish)
+
+(defvar chess-stockfish-regexp-alist
+  (list
+   (cons (concat "^bestmove\\s-+\\(" chess-algebraic-regexp "\\)")
+	 (function
+	  (lambda ()
+	    (message "move")
+	    (funcall chess-engine-response-handler 'move
+		     (chess-engine-convert-algebraic (match-string 1) t)))))
+   (cons "^id\\s-+name\\s-+\\(.+\\)$"
+	 (function
+	  (lambda ()
+	    (setq-local chess-engine-opponent-name (match-string 1)))))))
+
+(defun chess-stockfish-handler (game event &rest args)
+  (unless chess-engine-handling-event
+    (cond
+     ((eq event 'initialize)
+      (let ((proc (chess-uci-handler game 'initialize "stockfish")))
+	(when (and proc (processp proc) (eq (process-status proc) 'run))
+	  (process-send-string proc "uci\n")
+	  (setq chess-engine-process proc)
+	  t)))
+
+     (t
+      (if (and (eq event 'undo)
+	       (= 1 (mod (car args) 2)))
+	  (error "Cannot undo until after stockfish moves"))
+
+      (apply 'chess-uci-handler game event args)))))
+
+(provide 'chess-stockfish)
+
+;;; chess-stockfish.el ends here