str8ts.com

- str8ts.com

Str8ts is a brand new puzzle that rivals Sudoku for sophistication and depth. Daily and extreme weekly puzzles. Str8ts is available for print and in books.

164,594   $ 67,200.00

sudokuwiki.org

- sudokuwiki.org

Strategies for Sudoku, Sudoku X, Killer Sudoku and Jigsaw Sudoku - and the home of logical puzzle maker Andrew Stuart

222,889   $ 36,720.00