Do you play Sudoku? If so, you might like this brain teaser that uses letters instead of numbers. Here are the rules:

  1. Fill in all the empty cells so that the letters A – Y appear only once.
  2. Each letter must appear in the row where it appears outside of the box (e.g. the top row will contain the letters Y and D.
  3. Each letter must neighbor the letter that becomes before and after it in the alphabet, with the exception of A and Y.