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diff --git a/otherlibs/labltk/example/taquin.ml b/otherlibs/labltk/example/taquin.ml
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+(*************************************************************************)
+(*                                                                       *)
+(*                Objective Caml LablTk library                          *)
+(*                                                                       *)
+(*         Pierre Weis, projet Cristal, INRIA Rocquencourt               *)
+(*            Jacques Garrigue, Kyoto University RIMS                    *)
+(*                                                                       *)
+(*   Copyright 2002 Institut National de Recherche en Informatique et    *)
+(*   en Automatique and Kyoto University.  All rights reserved.          *)
+(*   This file is distributed under the terms of the GNU Library         *)
+(*   General Public License, with the special exception on linking       *)
+(*   described in file ../../../LICENSE.                                 *)
+(*                                                                       *)
+(*************************************************************************)
+
+(* $Id$ *)
+
+open Tk;;
+
+let d�coupe_image img nx ny =
+  let l = Imagephoto.width img
+  and h = Imagephoto.height img in
+  let tx = l / nx and ty = h / ny in
+  let pi�ces = ref [] in
+  for x = 0 to nx - 1 do
+    for y = 0 to ny - 1 do
+      let pi�ce = Imagephoto.create ~width:tx ~height:ty () in
+      Imagephoto.copy ~src:img
+        ~src_area:(x * tx, y * ty, (x + 1) * tx, (y + 1) * ty) pi�ce;
+      pi�ces := pi�ce :: !pi�ces
+    done
+  done;
+  (tx, ty, List.tl !pi�ces);;
+
+let remplir_taquin c nx ny tx ty pi�ces =
+  let trou_x = ref (nx - 1)
+  and trou_y = ref (ny - 1) in
+  let trou =
+    Canvas.create_rectangle
+      ~x1:(!trou_x * tx) ~y1:(!trou_y * ty) ~x2:tx ~y2:ty c in
+  let taquin = Array.make_matrix nx ny trou in
+  let p = ref pi�ces in
+  for x = 0 to nx - 1 do
+    for y = 0 to ny - 1 do
+      match !p with
+      | [] -> ()
+      | pi�ce :: reste ->
+          taquin.(x).(y) <-
+            Canvas.create_image
+                ~x:(x * tx) ~y:(y * ty)
+                ~image:pi�ce ~anchor:`Nw ~tags:["pi�ce"] c;
+          p := reste
+    done
+  done;
+  let d�placer x y =
+    let pi�ce = taquin.(x).(y) in
+    Canvas.coords_set c pi�ce
+      ~xys:[!trou_x * tx, !trou_y * ty];
+    Canvas.coords_set c trou
+      ~xys:[x * tx, y * ty; tx, ty];
+    taquin.(!trou_x).(!trou_y) <- pi�ce;
+    taquin.(x).(y) <- trou;
+    trou_x := x; trou_y := y in
+  let jouer ei =
+    let x = ei.ev_MouseX / tx and y = ei.ev_MouseY / ty in
+    if x = !trou_x && (y = !trou_y - 1 || y = !trou_y + 1)
+    || y = !trou_y && (x = !trou_x - 1 || x = !trou_x + 1)
+    then d�placer x y in
+  Canvas.bind ~events:[`ButtonPress] 
+                 ~fields:[`MouseX; `MouseY] ~action:jouer c (`Tag "pi�ce");;
+
+let rec permutation = function
+  | [] -> []
+  | l  -> let n = Random.int (List.length l) in
+          let (�l�ment, reste) = partage l n in
+          �l�ment :: permutation reste
+
+and partage l n =
+  match l with
+  | [] -> failwith "partage"
+  | t�te :: reste ->
+      if n = 0 then (t�te, reste) else
+        let (�l�ment, reste') = partage reste (n - 1) in
+        (�l�ment, t�te :: reste');;
+
+let create_filled_text parent lines =
+  let lnum = List.length lines
+  and lwidth =
+    List.fold_right
+     (fun line max ->
+       let l = String.length line in
+       if l > max then l else max)
+     lines 1 in
+  let txtw = Text.create ~width:lwidth ~height:lnum parent in
+  List.iter
+   (fun line ->
+        Text.insert ~index:(`End, []) ~text:line txtw;
+        Text.insert ~index:(`End, []) ~text:"\n" txtw)
+   lines;
+  txtw;;
+
+let give_help parent lines () =
+ let help_window = Toplevel.create parent in
+ Wm.title_set help_window "Help";
+
+ let help_frame = Frame.create help_window in
+
+ let help_txtw = create_filled_text help_frame lines in
+
+ let quit_help () = destroy help_window in
+ let ok_button = Button.create ~text:"Ok" ~command:quit_help help_frame in
+
+ pack ~side:`Bottom [help_txtw];
+ pack ~side:`Bottom [ok_button ]; 
+ pack [help_frame];;
+
+let taquin nom_fichier nx ny =
+  let fp = openTk () in
+  Wm.title_set fp "Taquin";
+  let img = Imagephoto.create ~file:nom_fichier () in
+  let c =
+    Canvas.create ~background:`Black
+     ~width:(Imagephoto.width img)
+     ~height:(Imagephoto.height img) fp in
+  let (tx, ty, pi�ces) = d�coupe_image img nx ny in
+  remplir_taquin c nx ny tx ty (permutation pi�ces);
+  pack [c];
+
+  let quit = Button.create ~text:"Quit" ~command:closeTk fp in
+  let help_lines =
+   ["Pour jouer, cliquer sur une des pi�ces";
+    "entourant le trou";
+    "";
+    "To play, click on a part around the hole"] in
+  let help =
+    Button.create ~text:"Help" ~command:(give_help fp help_lines) fp in
+  pack ~side:`Left ~fill:`X [quit] ;
+  pack ~side:`Left ~fill:`X [help] ;  
+  mainLoop ();;
+ 
+if !Sys.interactive then () else
+begin taquin "Lambda2.back.gif" 4 4; exit 0 end;;