Ray Robertson
My wife and I have been fans of Sudoku for the past several years but have never really progressed past the ‘Brown Belt’ difficulty. Since our recent enrollment in your ‘Sudoku University’ we have worked through to the Sophomore 203 level in your lessons and are enjoying your systematic approach and pattern solving techniques immensely. We look forward to tackling the ‘Black Belt’ challenges in the near future.
Thanks for a great product!