1) Japanese invention 2) Logic puzzle 3) Math puzzle 4) Sudoku companion 5) Sudoku-like puzzle
Found on
https://www.crosswordclues.com/clue/kenken
KenKen and KenDoku are trademarked names for a style of arithmetic and logic puzzle invented in 2004 by Japanese math teacher Tetsuya Miyamoto, who intended the puzzles to be an instruction-free method of training the brain. The names Calcudoku and Mathdoku are sometimes used by those who don`t have the rights to use the KenKen or KenDoku tradema....
Found on
http://en.wikipedia.org/wiki/KenKen
No exact match found.
