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Abstract
Sudoku is a popular game of logic, and there are many variations of the standard
puzzle. We investigate a variation of Sudoku that uses inequalities between cells
rather than numerical clues. We begin with an overview of the rules and
strategies of the game. We then examine the solvability of an individual
m
×
n
block with the use of partially ordered sets, and combine
2
× 2 blocks to
form
4
× 4
puzzles.
Keywords
Sudoku, partial order, total order, equivalence relation
Mathematical Subject Classification 2010
Primary: 06A06, 20B30, 91A46
Milestones
Received: 13 December 2012
Accepted: 30 March 2013
Published: 16 November 2013
Communicated by Ann Trenk