Java puzzle application

The project is about writing a program using Java language which will solve kenken puzzle ( 4 by 4 to 9 by 9). Three Java classes has to be coded; Board class, State class and Space class. In addition, a main Kenken class has to be coded as well. Two different strategies should be used to solve kenken puzzles; stack and queue. I can provide you with more detailed requirements of the project so that you can understand the requirements better.