| LeastCandidatesStrategy | A strategy for solving Sudoku puzzles that chooses as a start cell the last cell found having the least number of candidates | 
| Puzzle | A Sudoku Puzzle class | 
| SimpleStrategy | A simple strategy for solving Sudoku puzzles: it chooses the first unassigned cell from which to start assigning values | 
| Strategy | A Strategy is an approach to solving a Sudoku puzzle | 
 1.3.4
 
1.3.4