From f5cbdbb1b52d615b446a84a18b7779d18820f302 Mon Sep 17 00:00:00 2001
From: Michael R Sweet <michael.r.sweet@gmail.com>
Date: Thu, 24 Aug 2006 18:09:44 +0000
Subject: Add wording and tweak difficulty levels so that the Easy and Normal
 levels always generate "valid" Sudoku puzzles while Hard and Impossible are
 free to make Sudoku puzzles more fun/challenging (STR #1361)

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@5356 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 CHANGES         | 14 ++++++++------
 test/sudoku.cxx | 33 +++++++++++++++++++++++++++++----
 2 files changed, 37 insertions(+), 10 deletions(-)

diff --git a/CHANGES b/CHANGES
index b61023fab..8f80878c3 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,15 +1,17 @@
 CHANGES IN FLTK 1.1.8
 
-	- Fixed filechooser to behave as documented when 
-	  file pattern changes (STR #135s9)
+	- Updated the Sudoku game to show a notice about Hard and
+	  Impossible puzzles having multiple solutions which are
+	  not a bug or error (STR #1361)
+	- Fixed filechooser to behave as documented when file
+	  pattern changes (STR #1359)
 	- Completed the global function index and added an
 	  alphabetical list of all methods (STR #1319)
 	- Avoiding problems with some platforms that don't 
 	  implement hypot() (STR #1366)
-	- Fixed floating point value formatting
-	  for Fl_Spinner (STR #1331)
-	- Fixed Fl_Positioner callback 
-	  when released (STR #1387)
+	- Fixed floating point value formatting for Fl_Spinner
+	  (STR #1331)
+	- Fixed Fl_Positioner callback when released (STR #1387)
 	- Fixed WIN32 zero size window issue (STR #1387)
 	- Fixed Sudoku window positioning (STR #1398)
 	- Fluid Code Declarations can now handle
diff --git a/test/sudoku.cxx b/test/sudoku.cxx
index a328af8dd..e0b926ded 100644
--- a/test/sudoku.cxx
+++ b/test/sudoku.cxx
@@ -839,6 +839,23 @@ Sudoku::diff_cb(Fl_Widget *widget, void *d) {
     s->new_game(s->seed_);
     s->set_title();
 
+    if (diff > 1)
+    {
+      // Display a message about the higher difficulty levels for the
+      // Sudoku zealots of the world...
+      int val;
+
+      prefs_.get("difficulty_warning", val, 0);
+
+      if (!val)
+      {
+        prefs_.set("difficulty_warning", 1);
+	fl_alert("Note: 'Hard' and 'Impossible' puzzles may have more than "
+	         "one possible solution.\n"
+		 "This is not an error or bug.");
+      }
+    }
+
     prefs_.set("difficulty", s->difficulty_);
   }
 }
@@ -866,7 +883,17 @@ Sudoku::help_cb(Fl_Widget *, void *) {
 	"only once in each column and row. In addition, each 3x3 subgrid\n"
 	"may only contain one of each number.</P>\n"
 
-	"<P>This version of the puzzle is Copyright 2005 by Michael R Sweet</P>\n"
+	"<P>This version of the puzzle is copyright 2005-2006 by Michael R\n"
+	"Sweet.</P>\n"
+
+	"<P><B>Note:</B> The 'Hard' and 'Impossible' difficulty\n"
+	"levels generate Sudoku puzzles with multiple possible solutions.\n"
+	"While some purists insist that these cannot be called 'Sudoku'\n"
+	"puzzles, the author (me) has personally solved many such puzzles\n"
+	"in published/printed Sudoku books and finds them far more\n"
+	"interesting than the simple single solution variety. If you don't\n"
+	"like it, don't play with the difficulty set to 'High' or\n"
+	"'Impossible'.</P>\n"
 
 	"<H2>How to Play the Game</H2>\n"
 
@@ -1020,7 +1047,7 @@ Sudoku::new_game(time_t seed) {
     }
 
   // Show N cells...
-  count = 10 * (5 - difficulty_);
+  count = 11 * (5 - difficulty_);
 
   int numbers[9];
 
@@ -1050,8 +1077,6 @@ Sudoku::new_game(time_t seed) {
 	  break;
 	}
       }
-
-      sound_->play('A' + t - 1);
     }
   }
 }
-- 
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