## Su Doku

Su
Doku is usually played on a 9 by 9 board, divided into 3 by 3
cells. You can generalize this into playing on an M×M square
board broken into non-overlapping rectangular cells, each containing
M squares (an obvious question is to how define a puzzle where M is a
prime number). The solution of the puzzle is to place M symbols on the
board such that each row, column or cell contains each symbol exactly
once, without moving the initial clues. Puzzles with M<9 are called
Sub Dokus, those for M>9 are called Super Dokus.

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Related topic: Kakuro

# Super Doku

## The mathematics of Su Doku

A Super Doku is a Su Doku played on a larger grid. Some Super Dokus have
special names: the 12×12 puzzle (with a 3×4 cell) is called
the Dodeka Doku in
the
Times of London. The 15×15 puzzle, called Giant Su Doku, is
occassionally published in the Times of India. At this time there are
no mathematical results known for any Super Doku.

© Sourendu Gupta.
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Created on 09 October, 2005.