DEGREE OF DIFFICULTY Tough and Very Tough 225 PUZZLES It is important to understand how to use the Small El or Medium El to solve the puzzle. If the diamond number is six, it most likely means that you have a Small El or a Medium El. It could be a Country Road or Highway with Zero Exit Ramps or Large El, but they do not occur very often. You only go to the Shotgun Wedding Plan or Medium El Plan when you are truly stuck. Double check every box, row and column, then select a plan. Solve many puzzles quickly and efficiently with this book. SEE BACK COVER