#header, #leftColumn, #rightColumn, .addthis_toolbox, .mediumRectangle, #puzzleNavigation, #puzzleList, #footer, #startButton {
  display:none;
}

#middleColumn {
  border: 1px solid #000000;
  padding: 30px 50px 40px 50px;
  min-height: auto;
  margin: 20px auto;
  float: none;
}