Sudoku

A sudoku was a number-based puzzle which was solved with pen and paper. Sudokus of various difficulties were printed in the local newspaper of Winchelham. (PROSE: )
Within the sphere chamber, Rajesh Singh reported to Yvonne Hartman that he was on "Sudoku book 509". (TV: )
At the end of a long day, Colin Colchester-Price relaxed by doing Sudoku. (AUDIO: )
Category:Games from the real world
Category:Puzzles
Category:Mathematics from the real world