How to generate Sudoku boards for the Solver

sudoku_pretty.rb

# Mark Holmberg, Dixie State College of Utah
# CS 3520, Programming Languages
# 8 Sept. 2011
# http://www.sudoku-solutions.com/
# Purpose: Generate 'unsolved' sudoku puzzles for the sudoku
# solver to solve.

# Step One: Go to the URL above and hit the 'Random' button.

# Step Two: After the board is formed hit the 'Save' button and open the
# .csv file into your favorite editor and copy the string they give you.

# The next step requires that you have ruby installed on your system, if you don't
# you'll need to install it first.

# Step Three: open irb1.8 in a terminal by typing 'irb1.8' at the prompt
# Next type: board ="<my random string here>.to_s"
# This will tell Ruby that those random characters are a string.

#Step Four: Then type: 
board.split('').join(',').gsub!( /\./, '_' ).insert(0,'[').insert(-1, ']');
# into IRB. You will get a string back like the following
#[_,3,_,6,_,_,4,9,_,_,5,_,7,_,4,6,_,_,4,8,_,_,_,9,_,_,_,7,1,_,_,_,_,_,3,_,_,_,3,
#_,_,_,2,_,_,_,2,_,_,_,_,_,7,4,8,_,2,_,_,_,_,4,_,_,_,5,9,4,1,7,8,_,_,9,4,_,7,2,
#_,_,_]

# Step Five: Copy everything from the [ to the ] into your Sudoku prolog solver
# sudoku ( [<zomg big string here>], Solution ).

# Best of luck!