diff --git a/cross/cross_class.php b/cross/cross_class.php
index e556ef7..457623c 100755
--- a/cross/cross_class.php
+++ b/cross/cross_class.php
@@ -96,8 +96,8 @@ class Cross
             $this->mn20min = $this->mn20max;
         }
 
-        $this->m_words = array();
-        foreach ($this->m_input_answers as $word => $answer) {
+        $this->mwords = array();
+        foreach ($this->minputanswers as $word => $answer) {
             $len = game_strlen( $word);
 
             if ($len <= $this->mn20max) {
@@ -218,7 +218,7 @@ class Cross
 
         if ($score > $this->mbestscore) {
             $this->mbestcrosspos = $crosspos;
-            $this->m_best_cross_dir = $crossdir;
+            $this->mbestcrossdir = $crossdir;
             $this->mbestcrossword = $crossword;
             $this->mbestpuzzle = $puzzle;
 
@@ -622,7 +622,7 @@ class Cross
         $ssolutions = '';
         $shtmlsolutions = '';
         $swordx = "";
-        $ssordy = "";
+        $swordy = "";
         $sclue = "";
         $lasthorizontalword = -1;
         $i = -1;
diff --git a/cross/crossdb_class.php b/cross/crossdb_class.php
index 4b6660a..286ac6e 100755
--- a/cross/crossdb_class.php
+++ b/cross/crossdb_class.php
@@ -85,12 +85,12 @@ class CrossDB extends Cross {
         $this->mmaxrow = $crossrec->rows;
 
         if ($g == "") {
-            $g = str_repeat( ' ', $this->m_maxcol * $this->m_maxrow);
+            $g = str_repeat( ' ', $this->mmaxcol * $this->mmaxrow);
         }
 
         $load = false;
 
-        $puzzle = str_repeat('.', $this->m_maxrow * $this->m_maxcol);
+        $puzzle = str_repeat('.', $this->mmaxrow * $this->mmaxcol);
         if ($recs = $DB->get_records( 'game_queries', array( 'attemptid' => $crossrec->id))) {
             $a = array();
             foreach ($recs as $rec) {
diff --git a/cross/play.php b/cross/play.php
index 43bd043..326ac18 100755
--- a/cross/play.php
+++ b/cross/play.php
@@ -1146,7 +1146,7 @@ function game_cross_show_welcome1() {
 
 function game_cross_show_legends( $cross) {
     echo '<td>';
-    ShowLegend( $cross->m_LegendH,  get_string( 'cross_across', 'game'));
-    ShowLegend( $cross->m_LegendV, get_string( 'cross_down', 'game'));
+    ShowLegend( $cross->mlegendh,  get_string( 'cross_across', 'game'));
+    ShowLegend( $cross->mlegendv, get_string( 'cross_down', 'game'));
     echo '</td>';
 }
diff --git a/cryptex/play.php b/cryptex/play.php
index 8375d2a..d9b88a5 100755
--- a/cryptex/play.php
+++ b/cryptex/play.php
@@ -32,7 +32,7 @@ function game_cryptex_continue( $id, $game, $attempt, $cryptexrec, $endofgame, $
         $endofgame = false;
     }
 
-    if  $attempt != false and $cryptexrec != false) {
+    if( $attempt != false and $cryptexrec != false) {
         $crossm = $DB->get_record( 'game_cross', array( 'id' => $attempt->id));
         return game_cryptex_play( $id, $game, $attempt, $cryptexrec, $crossm, false, false, false, $context);
     }
diff --git a/db/importsudoku.php b/db/importsudoku.php
index c3b1f62..cdc93f5 100755
--- a/db/importsudoku.php
+++ b/db/importsudoku.php
@@ -213,7 +213,7 @@ $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (
     "'IEB14368GG34H56A298F17IB354375819DB69FB47E38114HF2C9752317FH59D5IG2D361H486E19BCG')");
 $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 24,".
     "'938FBG541AD6895732257143HI6472385A6IFHC971524519FBD378BE37I681D469218C5G7HA43E962')");
-$DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 26,"
+$DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 26,".
     "'36I8EA27D451B7CI8FHB79461537B81954C6534F2G1986IA43827E982F13E473A57DB8F9G6D5H9312')");
 $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 28,".
     "'DAB73865978645I12C395A26G84IB4E67C8AE37H12I6461H4CI57BB4E89C17F3916G52D88F72D19E3')");
@@ -289,7 +289,7 @@ $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (
 
 $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 25,".
     "'12E784I3FD89C62G51F3G951B84B6GD9351851482F97C8I31G54F23D2HE96716I51D7B3871H32654I')");
-$DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 27,"
+$DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 27,".
     "'163I48EG29ED2671H3278CEA4I6HE46C921773A528DIFIF27A483532A496785H75312FDI649E8G123')");
 $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 31,".
     "'67C1B5IDH248GF93A5IEA3DH276DIB816E376715BC894583794FA2BFA78I354D57A32I8F83946E12G')");
@@ -303,7 +303,7 @@ $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (
     "'I17528D634C8IGF21E5624A37H92E13968G4347H5A692F98274C5114B73E68I5F9AHDG2383G92F14E')");
 $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 25,".
     "'463I81B5G97H42E61CE21G3F894726HCD519389561G42DA59723F86751D839BAI42C78E62HC65I147')");
-$DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 27,"
+$DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 27,".
     "'2A47E638939F148B5G57823I16D46589C12G723FA5D8IHI1G42653F72I41E388CD5F29G19153H7DBF')");
 $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 28,".
     "'DHA625937756349A8B92CG1HD65A537DBH96IGD86C21528F591C4G274CF9518631528DIGHEI174632')");
@@ -417,7 +417,7 @@ $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (
     "'53H27A49FG6B49381E419F58B3GFBE9871D3378F4A5299D15237H6864G59C1223G1H4IE6A9E36B874')");
 $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 24,".
     "'FA4E93B783576H2ID1B98D17F3592E36G48113F8245GI7H41593F2756AC2H49D1879526392C84F57A')");
-$DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 27,"
+$DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 27,".
     "'965HA34BG72364I58AH1DE27639GEBA94638418CF59729F3782DEAB8F54I3711972C6HE43451G82I6')");
 $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 27,".
     "'6I7841CB5DHEC9271623AE7FH49962GA45H38745639BAC1E92846747915HB3FFC82D71591526I37HD')");
@@ -444,7 +444,7 @@ $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (
     "'BE63A47H9I48FBG35A73A5982DFADE972863876513BI4329HF415743HEIG621AFE482739I72613DH5')");
 $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 30,".
     "'HGD19C52F3E9HB67D1F217548CIIEH362417614975BHC372DA8596281FCE749D3G198562I652D7AHC')");
-$DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 25,"..
+$DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 25,".
     "'B8E1639749362GD851147589FBC752HC64I1AI8547F2343F91BH7E649E1GC2H7AB389465358264GI1')");
 $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 25,".
     "'6C72598A452H431GI69D1HFG3524HB37A59695G862ADC613D9E728I28163G45675BHD3191C457928F')");
@@ -705,7 +705,7 @@ $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (
     "'783I62DE1DA23857I6F59AG4C28519FCG2486GH12D95C2439857AF1BF89537D5492CG861837461EIB')");
 $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 25,".
     "'39158F27D6H72D91CEB4E3G1869A69742H5357C8619BD482IEC6179B86C54AGG564A239813479H52F')");
-$DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 25,"
+$DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 25,".
     "'8G1C4B569C59716DH2B6D9857ACD56I8C2178GA624593392571HDF6947BH135238165IDGAE7439628')");
 
 $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 27,".
@@ -2387,8 +2387,7 @@ $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (
     " 'IB5C47F184H72A6953C1695H7BD5837IB46AG69148E3B2415FC8798E91C62G4F7D82E39AA32D9GF85')");
 $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 26,".
     " '16H92C75DB59D76A83743H1E62I3I58476AB6D2591GCH178CF2954536D81BG99273FE814DHA297536')");
-".
-    "
+
 $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 25,".
     " 'BGD568391569A4C872381927FDE452713I8F398FEDB17GA6892534F49HC71B5731425I8FB5H16I473')");
 $DB->execute( "INSERT INTO {game_sudoku_database}( level, opened, data) VALUES (1, 26,".
diff --git a/hiddenpicture/picture.php b/hiddenpicture/picture.php
index 5e8acee..aa17a1c 100755
--- a/hiddenpicture/picture.php
+++ b/hiddenpicture/picture.php
@@ -109,7 +109,7 @@ function shownumber( $imghandle, $imgnumbers, $number, $x1 , $y1, $width, $heigh
         $srch = $sizenumbers[ 1];
         $dstw = $width / 10;
         $dsth = $dstw * $srch / $srcw;
-        imagecopyresized( $imghandle, $imgnumbers, $dstx, $dsty, $srcx, 0, $dstw, $dsth, $srcw, $srchh);
+        imagecopyresized( $imghandle, $imgnumbers, $dstx, $dsty, $srcx, 0, $dstw, $dsth, $srcw, $srch);
     } else {
         $number1 = floor( $number / 10);
         $number2 = $number % 10;
diff --git a/hiddenpicture/play.php b/hiddenpicture/play.php
index 88ad4a3..f269574 100755
--- a/hiddenpicture/play.php
+++ b/hiddenpicture/play.php
@@ -140,6 +140,7 @@ function game_hiddenpicture_selectglossaryentry( $game, $attempt) {
         }
     }
     if (count( $ids) == 0) {
+        $a = new stdClass();
         $a->name = "'".$DB->get_field( 'glossary', 'name', array( 'id' => $game->glossaryid2))."'";
         print_error( get_string( 'hiddenpicture_nomainquestion', 'game', $a));
         return false;
diff --git a/locallib.php b/locallib.php
index 74ca377..5a26b41 100755
--- a/locallib.php
+++ b/locallib.php
@@ -1517,12 +1517,18 @@ function game_select_from_repetitions( $game, $recs, $need) {
     return $ret;
 }
 
-function game_grade_responses( $question, $responses, $maxgrade, &$answertext) {
+function game_grade_responses( $question, $responses, $maxgrade, &$answertext, &$answered) {
+    $answered = true;
+
     if ($question->qtype == 'multichoice') {
         if ($question->options->single == 0) {
             return game_grade_responses_multianswer( $question, $responses, $maxgrade, $answertext);
         }
         $name = "resp{$question->id}_";
+        if( !isset( $responses->$name)) {
+            $answered = false;
+            return 0;
+        }
         $value = $responses->$name;
         $answer = $question->options->answers[ $value];
         $answertext = $answer->answer;
diff --git a/millionaire/play.php b/millionaire/play.php
index 394af3f..401c61d 100755
--- a/millionaire/play.php
+++ b/millionaire/play.php
@@ -172,14 +172,14 @@ function game_millionaire_showgrid( $game, $millionaire, $id, $query, $aanswer,
         $styletext = "style='$stylequestion'";
     }
 
-    $aval = array( 100, 200, 300, 400, 500, 1000, 1500, 2000, 4000, 5000, 10000, 20000, 40000, 80000, 150000);
+    $aval = array( 100, 200, 300, 400, 500, 1000, 1500, 2000, 4000, 5000, 10000, 20000, 40000, 80000, 150000);    
     for ($i = 15; $i >= 1; $i--) {
         $btr = false;
 
         switch ($i) {
             case 15:
                 echo "<td rowspan=".(16 + count( $aanswer)).
-                    "$background>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td>\r\n";
+                    " $background>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td>\r\n";
                 $btr = true;
                 break;
             case 14:
diff --git a/snakes/play.php b/snakes/play.php
index e1f9879..79e6c79 100755
--- a/snakes/play.php
+++ b/snakes/play.php
@@ -312,7 +312,7 @@ function game_snakes_check_questions( $id, $game, $attempt, $snakes, $context) {
         $query = new stdClass();
         $query->id = $snakes->queryid;
 
-        $grade = game_grade_responses( $question, $responses, 100, $answertext);
+        $grade = game_grade_responses( $question, $responses, 100, $answertext, $answered);
         if ($grade < 99) {
             // Wrong answer.
             game_update_queries( $game, $attempt, $query, 0, $answertext);
diff --git a/sudoku/class.Sudoku.php b/sudoku/class.Sudoku.php
index f6da5ca..3bf96be 100755
--- a/sudoku/class.Sudoku.php
+++ b/sudoku/class.Sudoku.php
@@ -56,7 +56,7 @@
 
 @require_once("SDD/class.SDD.php");
 
-/**
+/*
  * @author Dick Munroe <munroe@csworks.com>
  * @copyright copyright @ 2005 by Dick Munroe, Cottage Software Works, Inc.
  * @license http://www.csworks.com/publications/ModifiedNetBSD.html
@@ -64,7 +64,7 @@
  * @package Sudoku
  */
 
-/**
+/*
  * Basic functionality needed for ObjectSs in the Sudoku solver.
  *
  * Technically speaking these aren't restricted to the Sudoku classes
@@ -73,7 +73,7 @@
  * @package Sudoku
  */
 
-class ObjectS {
+class objects {
     /**
      * @desc Are two array's equal (have the same contents).
      * @param array
@@ -95,11 +95,11 @@ class ObjectS {
         return (count($xxx) == 0);
     }
 
-    /**
+    /*
      * Deep copy anything.
-     * 
+     *
      * @access public
-     * @param array $theArray [optional] Something to be deep copied.  [Default is the current
+     * @param array $theArray [optional] Something to be deep copied.  Default is the current
      *                        ObjectS.
      * @return mixed The deep copy of the input.  All references embedded within
      *               the array have been resolved into copies allowing things like the
@@ -126,7 +126,7 @@ class ObjectS {
     }
 }
 
-/**
+/*
  * The individual cell on the Sudoku board.
  *
  * These cells aren't restricted to 9x9 Sudoku (although pretty much everything else
@@ -135,7 +135,7 @@ class ObjectS {
  *
  * @package Sudoku
  */
-class Cell extends ObjectS {
+class cell extends objects {
     protected $r;
     protected $c;
 
@@ -226,7 +226,7 @@ class Cell extends ObjectS {
         }
     }
 
-    /**
+    /*
      * Used to make sure that solved positions show up at print time.
      * The value is used as a candidate for "slicing and dicing" by elimination in
      * Sudoku::_newSolvedPosition.
@@ -240,7 +240,7 @@ class Cell extends ObjectS {
         $this->state = array($value => $value);
     }
 
-    /**
+    /*
      * @desc return the state of a cell.
      * @access protected
      * @return mixed Either solved state or array of state pending solution.
@@ -250,7 +250,7 @@ class Cell extends ObjectS {
         return $this->state;
     }
 
-    /**
+    /*
      * @desc Has the state of this cell been applied to the board.
      * @access public
      * @return boolean True if it has, false otherwise.  Implies that IsSolved is true as well.
@@ -260,7 +260,7 @@ class Cell extends ObjectS {
         return $this->applied;
     }
 
-     /**
+     /*
       * @desc Has this cell been solved?
       * @access public
       * @return boolean True if this cell has hit a single state.
@@ -270,7 +270,7 @@ class Cell extends ObjectS {
         return !is_array($this->state);
     }
 
-    /**
+    /*
      * This is used primarily by the pretty printer, but has other applications
      * in the code.
      *
@@ -293,7 +293,7 @@ class Cell extends ObjectS {
         }
     }
 
-    /**
+    /*
      * This is the negative inference of Sudoku.  By eliminating values the
      * cells approach solutions.  Once a cell has been completely eliminated,
      * the value causing the complete elimination must be the solution and the
@@ -1360,7 +1360,7 @@ class sudoku extends ObjectS {
          * Pick a spot on the board and get the clues set up.
          */
 
-        $thechoice = mt_rand(0, count($thecouplings[$themaximumcoupling]) - 1;
+        $thechoice = mt_rand(0, count($thecouplings[$themaximumcoupling]) - 1);
         $thecluespositions[] = $thecouplings[$themaximumcoupling][$thechoice];
         $therow = $thecouplings[$themaximumcoupling][$thechoice][0];
         $thecolumn = $thecouplings[$themaximumcoupling][$thechoice][1];
@@ -1911,7 +1911,7 @@ class sudoku extends ObjectS {
 
 class SudokuTemplates extends Sudoku
 {
-    public function sudokutemplates($theDebug = false) {
+    public function sudokutemplates($thedebug = false) {
         $this->sudoku($thedebug);
     }
 
diff --git a/sudoku/play.php b/sudoku/play.php
index a2f1f66..89eeda7 100755
--- a/sudoku/play.php
+++ b/sudoku/play.php
@@ -527,7 +527,10 @@ function game_sudoku_check_questions( $id, $game, $attempt, $sudoku, $finishatte
             continue;
         }
 
-        $grade = game_grade_responses( $question, $responses, 100, $answertext);
+        $grade = game_grade_responses( $question, $responses, 100, $answertext, $answered);
+        if( $answered == false) {
+            continue;
+        }
         if ($grade < 99) {
             // Wrong answer.
             game_update_queries( $game, $attempt, $query, $grade / 100, $answertext);
@@ -555,7 +558,7 @@ function game_sudoku_check_glossaryentries( $id, $game, $attempt, $sudoku, $fini
     if (!($entries = $DB->get_records_select( 'glossary_entries', "id IN ($entrieslist)"))) {
         print_error( get_string('noglossaryentriesfound', 'game'));
     }
-    foreach (entries as $entry) {
+    foreach ($entries as $entry) {
         $answerundefined = optional_param('resp'.$entry->id, 'undefined', PARAM_TEXT);
         if ($answerundefined == 'undefined') {
             continue;