Summer 2016 Solution

 

XBDZGPRIQGSMQPGAZZ

LILXOXHMGFKQPGSMQPGAZZ

LMPRKMUQGUQRLQOPDZGFRIQ

JAEXLZOQDPWTHYXBDZGPRIQ

 

The clues led the two solvers to A Midsummer Night’s Dream. They did an internet search of famous quotations from the play, then checked it matched the code. Could it be solved without internet searching? I think so. As with all code cracking, it’s about looking for repeated patterns:

 

  • There were 2 Caesar Ciphers combined in an ABAB pattern, starting with A at each new line.
  • Two of them start with L. Statements often begin with I. Could i be encoded L? Then A is a +3 shift, said to be Caesar’s first ever cipher.
  • This would mean the first line starts U A D O N
  • a-d is often and. If so n would be encoded Z, a +12 shift for cipher B.
  • The lines rhyme. So azz, which ends the first two lines in BAB, must equal riq in ABA. +12 +3 +12 means AZZ is code for own.
  • +3 +12 +3 means RIQ is code for own. So we have almost certainly cracked the code!

Using this method on the entire code gives:

 

Up and down, up and down,
I will lead them up and down:
I am fear’d in field and town:
Goblin, lead them up and down.

 

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