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NEW, HUGE, AND CHALLENGING - LMI Fun Contest - 4th to 7th March
   LMI Tests -> LMI Fun Contests29 posts • Page 2 of 2 • 1 2
Subject: RE: NEW, HUGE, AND CHALLENGING - LMI Fun Contest - 4th to 7th March @ 2016-03-11 12:24 AM (#21230 - in reply to #21211) (#21230) Top

Posts: 3

Location: Canada
I believe there is a somewhat simpler way to determine that the L-blocks must all contain only odd numbers.

If one looks at any row (or column) of 2x2 blocks, there are 6 blocks each containing 4 values and 2 L-blocks each containing 3 values (when the 10s are excluded). In these blocks we need to place 10 odds, 8 evens and 12 tens with the restriction that each block can only contain values of the same type. The only way the odds can be accommodated is by using one 4-block and both L-blocks. The remaining groups fit comfortably in 2 and 3 4-blocks respectively.

I still can't understand how anyone can solve this puzzle in 41 minutes! :)
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