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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; Play against crafty!
;;
(require 'chess-common)
(defgroup chess-crafty nil
"The publically available chess engine 'crafty'."
:group 'chess-engine)
(defcustom chess-crafty-path (or (executable-find "crafty")
(executable-find "wcrafty"))
"The path to the crafty executable."
:type 'file
:group 'chess-crafty)
(defvar chess-crafty-evaluation nil)
(make-variable-buffer-local 'chess-crafty-evaluation)
(defvar chess-crafty-regexp-alist
(list
(cons (concat "\\(White\\|Black\\)\\s-*([0-9]+):\\s-+\\("
chess-algebraic-regexp "\\)\\s-*$")
(function
(lambda ()
(funcall chess-engine-response-handler 'move
(chess-engine-convert-algebraic (match-string 2) t)))))
(cons "total evaluation\\.+\\s-+\\([-+0-9.]+\\)"
(function
(lambda ()
(setq chess-crafty-evaluation
(string-to-number (match-string 1))))))
(cons "{\\(Black\\|White\\) resigns}"
(function
(lambda ()
(funcall chess-engine-response-handler 'resign))))
(cons "\\(Illegal move\\|unrecognized/illegal command\\):\\s-*\\(.*\\)"
(function
(lambda ()
(error (match-string 1)))))
(cons "command not legal now"
(function
(lambda ()
(error (match-string 0)))))))
(defun chess-crafty-handler (game event &rest args)
(unless chess-engine-handling-event
(cond
((eq event 'initialize)
(let ((proc (chess-common-handler game 'initialize "crafty")))
(when (and (processp proc)
(eq (process-status proc) 'run))
(process-send-string proc (concat "display nogeneral\n"
"display nochanges\n"
"display noextstats\n"
"display nohashstats\n"
"display nomoves\n"
"display nonodes\n"
"display noply1\n"
"display nostats\n"
"display notime\n"
"display novariation\n"
"alarm off\n"
"ansi off\n"))
(setq chess-engine-opponent-name "Crafty")
t)))
((eq event 'setup-pos)
(chess-engine-send nil (format "setboard %s\n"
(chess-pos-to-string (car args)))))
((eq event 'evaluate)
(setq chess-crafty-evaluation nil)
(chess-engine-send nil "display general\nscore\ndisplay nogeneral\n")
(let ((limit 50))
(while (and (null chess-crafty-evaluation)
(> (setq limit (1- limit)) 0))
(sit-for 0 100 t))
chess-crafty-evaluation))
((eq event 'setup-game)
(let ((file (chess-with-temp-file
(insert (chess-game-to-string (car args)) ?\n))))
(chess-engine-send nil (format "read %s\n" file))))
((eq event 'set-option)
(cond
((eq (car args) 'resign)
(if (cadr args)
(chess-engine-send nil "resign 9\n")
(chess-engine-send nil "resign -1\n")))
((eq (car args) 'ponder)
(if (cadr args)
(chess-engine-send nil "ponder on\n")
(chess-engine-send nil "ponder off\n")))))
(t
(if (and (eq event 'undo)
(= 1 (mod (car args) 2)))
(error "Cannot undo until after crafty moves"))
(apply 'chess-common-handler game event args)))))
(provide 'chess-crafty)
;;; chess-crafty.el ends here
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