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Nancy Drew: Ghost Dogs of Moon Lake Hints

Solving the Envelope-Sorting Puzzle (Juniors)

  • 1 of 5: This is what the box looks like with the years translated, but not yet sorted (before any envelopes are moved):

    1911  1919  1945  1997
    1904  1917  1941  1970
    1908  1960  1939  1969
    1910  1914  1932  1925
    1900  1913  1915  1951
  • 2 of 5: This is what the box looks like when the years are translated and sorted (after all the envelopes are moved):

    1911  1919  1945  1997
    1910  1917  1941  1970
    1908  1915  1939  1969
    1904  1914  1932  1960
    1900  1913  1925  1951
  • 3 of 5: This is what the box looks like when the years are sorted (after all the envelopes are moved and the puzzle is solved):

    MCMXI     MCMXIX    MCMXLV    MCMXCVII
    MCMX      MCMXVII   MCMXLI    MCMLXX 
    MCMVIII   MCMXV     MCMXXXIX  MCMLXIX
    MCMIV     MCMXIV    MCMXXXII  MCMLX  
    MCM       MCMXIII   MCMXXV    MCMLI  
  • 4 of 5: Following are the exact moves to solve the puzzle.
  • 5 of 5: Below is a diagram of the wooden box showing all the envelopes.  The diagram has numbered the envelopes starting in the bottom left corner, working up the first column, then moving to the bottom of the next column and working up, continuing until all twenty of the envelopes are numbered.  Next to each of these numbers is the required move, in parenthesis.  The "(4)" written next to the second envelope means "swap the envelope found at position number 4 with the one found here."  If the entire move is omitted, you do not swap an envelope here; the correct one is already in position.  For this particular solution, it is important to work in the order the envelopes are numbered below (this is because you swap envelopes with every move, so the moves listed here will not refer to the correct envelope if you were to work in some other order).

    5       10       15       20    
    4        9       14       19    
    3        8 (11)  13       18    
    2 (4)    7       12       17    
    1        6       11 (17)  16