On Blaine’s Puzzle Blog there was a sudoku variation called a mini-sudoku posted recently. When I first heard the title, I thought it was just a sudoku puzzle with a smaller grid, but it’s more clever than that. The puzzle is a 3X3 grid, one of the inner squares in a sudoku puzzle. This means that the squares in the grid need to be filled with the digits 1-9. The only clues that you have is the sum of the digits in L-shaped sections around the outside of the grid.
I didn’t catch this one when it first came up because of the name. But it’s worth a closer look.
You may also like to try out this new puzzle Suduro which is a fun, elegant new variation on Sudoku, combining the challenges of Sudoku and Kakuro puzzles. I loved it and recommend it thoroughly.
http://www.suduro.com/