Site with puzzles playable online, tutorial, tips, etc.
Math Games, KenKen
Puzzles playable online, sizes 3x3 to 9x9, as well as tutorials and tips.
Many free puzzles playable online, in three sizes: 4x4, 6x6, and 8x8, in three difficulty levels. Also has "no-op" puzzles (where the operator clue is not given).
NekNek puzzles - Sudoku + Math
Site with 1200 Calcudoku puzzles, sizes 4x4 to 9x9, solvable online.
Online Calcudoku Puzzles
Daily Calcudoku (sizes 4x4 to 12x12) puzzles which can be solved for points.
Online encyclopedia article about the game.
A New Puzzle Challenges Math Skills
New York Times article by Will Shortz about the development of KenKen and how it is played. (February 09, 2009)
Last update:December 5, 2015 at 14:03:59 UTC