Dear Ed, Here's the answer to the chess sudoku problem. 467|B38|251 1K5|462|387 283|517|K46 342|875|16B 671|3K4|528 B58|621|734 73K|246|815 814|753|6K2 526|18B|473 As Peter Taylor noted, the symmetry (in this case, among pieces only) is unfortunate, and so is the limited range of pieces. I have an idea for a "quick" fix, but I'd like to keep it a secret for now.... Sincerely, Bryce Herdt