Diamond squares

Posted on 19/08/2011 by Peter Cameron

If you like Latin squares and such things, take a look at Diamond Geezer’s post for today: a pair of orthogonal Latin squares with two disjoint common transversals, and some entries given (if you do the harder puzzle).

About Peter Cameron

I count all the things that need to be counted.
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4 Responses to Diamond squares

  1. David Craven says:
    19/08/2011 at 14:54

    I assume that the “harder” puzzle is aimed at non-mathematicians, as presumably any mathematician will just apply the group S_3 x S_3 to the symbols that aren’t J and D to get an appropriate Latin square.

    Reply
  2. diamond geezer says:
    19/08/2011 at 17:33

    From feedback on the site, it seems most people failed to realise that the second puzzle was a trivial transformation of the first.

    Reply

  3. Pingback: Geezer Puzzle « Log24

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