Welcome to KENKEN™!
http://www.kenken.com/

fun

Math objectives

How he solved a limited purpose computer vision problem by applying knowledge about the problem domain.

Weil iPhones Sudokus ganz leicht erkennen können.

Solving a Sudoku using Recursive Subquery Factoring

OracleのSQL再起処理で数独を解く

AMIS Technology blog » Blog Archive » Oracle RDBMS 11gR2 - Solving a Sudoku using Recursive Subquery Factoring

Dr. Donald Knuth’s Dancing Links Algorithm solves an Exact Cover situation. The Exact Cover problem can be extended to a variety of applications that need to fill constraints. Sudoku is one such special case of the Exact Cover problem.

See also the references, esp. Knuth's original paper.