From Copious Systems:
Solve Sudoku Puzzles or Make Sudoku Multiple Choice Tests that you can distribute to your friends and students with the SudokuDots student edition. A.I. techniques are employed to solve many Sudoku Puzzles found in the morning paper. The tests that you make include your questions; and, a correct answer to the question serves up the number that goes in the Sudoku cell, while a wrong answer forces the test take to find the number.