This is a work in progress for an app which uses OCR to solve a partial solved or unsolved Sudoku Puzzle Uses OpenCV and Tesseract.
Sources:
http://www.raywenderlich.com/12065/how-to-create-a-simple-android-game
https://github.com/rmtheis/android-ocr
https://play.google.com/store/apps/details?id=edu.sfsu.cs.orange.ocr
http://roncemer.com/software-development/java-ocr/
http://sudokugrab.blogspot.ca/2009/07/how-does-it-all-work.html
http://www.aishack.in/tutorials/sudoku-grabber-with-opencv-plot/
http://www.salesnews.pl/img/sudoku.jpg
http://stackoverflow.com/questions/7263621/how-to-find-corners-on-a-image-using-opencv
http://www.shogun-toolbox.org/static/notebook/current/Sudoku_recognizer.html