The constructor contest is finished (actually was finished yesterday). There were 10 entrants. The winner, as those of you who check mathgrant’s blog will know, was Projectyl, who got 16 of 18 correct. The correct answer was
In other words, except for Sum and Greater-Than, mathgrant made the puzzle at the top of each page, and except for Cipher and Greater-Than, I made the puzzle on the bottom. This means Greater-Than flipped the usual pattern, something that a lot of people caught onto to my surprise.
The fewest correct responses were provided for the hard Shikaku; only three entrants pegged that one as mine. Next was the hard Cipher, which only four correctly guessed was mathgrant’s. The winning entry by Projectyl only missed the easy Sum and hard Cipher.
In light of that last bit, since Projectyl already got a (fairly challenging) Cipher puzzle constructed for him by mathgrant, I thought about perhaps giving him a Sum puzzle. So I did. Congratulations to him, and enjoy the puzzle.
(Click for larger size)
Read down the diagonal to see how his alias was worked in. Warning: Despite the fact that it was the easy Sum that Projectyl missed, this puzzle is very, very challenging.