Author(s): The Puzzle Society
Our second collection of Pocket Posh Killer Sudoku presents 100 puzzles in four difficulty levels. In addition to the rules of traditional Sudoku, the sum of the digits in each inner cage must equal the number in the top left corner of the cage.
The Puzzle Society, www.thepuzzlesociety.com, is the Web's premier source for challenging, professionally constructed puzzles and games. Boasting a gaming archive of more than 7,000 puzzles, the Puzzle Society offers more than 50 nationally syndicated puzzles, including the Washington Post Crossword, L.A. Times Crossword, Universal Crossword, Universal Jigsaw, and Daily Jumble.