**Calculator
Programs for Solving Sudoku Puzzles**

My colleague, Mark Spahn, has developed a quite remarkable set of
programs that solve what have come to be known as Sudoku puzzles. These are
the puzzles that appear regularly in many newspapers and on the web. Because
these programs are based on some interesting mathematics, Mark, Ron
Lancaster, Deborah Moore-Russo and I have witten an essay entitled "An
unexpected use of primes: solving sudokus by calculator," that is to appear in
the July 2010 issue of *The Mathematical Gazette*.

**Download
Program Information **

Instructions for Using the Sudoku Programs

Annotated TI-84 Sudoku Program Listing

A List of the TI-84 Calculator Programs

Handling Memory for Large Programs

Note: These programs will work for TI-83 users with very minor
modifications. The changes are due to the fact that the TI-83 does not
process timing commands. Once you have downloaded the programs to your
computer, you will need to remove any command line that reads
prgmSHTIME from the code for the routines
AASUDOKU, CELLS, CELLHYPS and ENNEADS. (Alternately, you can do this
after you have transferred the files to your calculator.) You will also
not need the program SHTIME.