Shifting puzzle
    
      --- Introduction ---
    
  
 
Shifting puzzle is an online jigsaw puzzle game, where the pieces can only be shifted
  vertically or horizontally, column by column or row by row. It is however
  guaranteed that the solution exists in all the cases presented to you.
  Few mathematical knowledge is necessary in order to play
  Shifting puzzle
  .
  On the contrary, you can take a look on the exercise-game
Q-Puzzle    to see how a jigsaw puzzle can require fairly deep mathematical concepts.
        The most recent version
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    - Description: recover a jigsaw puzzle by shifting rows or columns. interactive exercises, online calculators and plotters, mathematical recreation and games
 
    - Keywords: interactive mathematics, interactive math, server side interactivity, algebra, permutation, jigsaw, puzzle