Killer sudoku is similar to the other levels in that each of the numbers 1-9 must fit into each 9-by-9 square. No number can ...

Want to stretch your kids' critical thinking abilities? Logic puzzles are great problem-solving activities that teach logical ...

As Gage and Schlesinger explain on the game’s website, sudoku puzzles are generated programmatically, allowing puzzle creators to dial in their difficulty. Gage and Schlesinger built a sudoku ...