This year's Puzzle Design Tournament is over, and we're still waiting to compile the results. In the meantime, I'd like to provide the puzzle I submitted, to see if anyone in the larger internet crowd can beat the submissions found during the tournament.
In each cell of a 7x7 grid, place a digit from 1 to 9 or a black square. Numbers are formed by adjacent digits, horizontally or vertically. Each digit may be used only once within a number, and the sum of the digits in each number must be unique (different from each other). Maximize the score of: (Sum of all digits) + (Every appearance of a full set of 1-9)x10.
The original puzzle, with an
example, can be seen at the PDT site:
Here's the URL directly to the PDF file (puzzle 14): http://www.otuzoyun.com/puzzledesign/pdt2005.pdf
Source: Original, submitted to the 2005 Puzzle Design Tournament.