Note: This puzzle is a contest puzzle. All correctly submitted answers (in the applet below the puzzle) before November 9th will be entered into the contest drawing. Two solvers will each get a Grandmaster Puzzles/Thomas Snyder puzzle book of their choice.
(view directly for a larger image)
Theme: 200th Puzzle Contest Spectacular
Author/Opus: This is the 200th puzzle from Thomas Snyder, aka Dr. Sudoku.
Rules: To be determined by solver. (Edit: the full rules are now available on this post.)
Answer String: Enter the final answer as a single string of twelve capital letters.
Time Standards (highlight to view): Grandmaster = 20:00, Master = 35:00, Expert = 1:10:00