RuleOfNIdenticalCellsOfSizeN (dev.hcf.ball:ball-game API 3.0.20.20251111 API)

java.lang.Object
- ball.game.sudoku.Rule
- - ball.game.sudoku.RuleOfElimination
  - - ball.game.sudoku.RuleOfNIdenticalCellsOfSizeN

```
@ServiceProviderFor(Rule.class)
public class RuleOfNIdenticalCellsOfSizeN
extends RuleOfElimination
```
Sudoku "rule-of-N-identical-cells-of-size-N" Rule implementation. If a row, column, or nonet contain two cells that are identical with the same two possible digits, then those digits may be removed as possible solutions from the other cells in that same row, column, or nonet because those two digits may only be used as a solution in those two cells. This idea can be extended to three identical cells of three remaining options, four of four, etc... It also works for N=1 (cell is solved).

Author:

Allen D. Ball

- Constructor Summary
  
  Constructors
  Constructor Description
  
  RuleOfNIdenticalCellsOfSizeN()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  boolean applyTo(Puzzle puzzle)
  Method to apply this Rule to the argument Puzzle.
  - Methods inherited from class ball.game.sudoku.Rule
    count, solved, sum
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - RuleOfNIdenticalCellsOfSizeN
```
public RuleOfNIdenticalCellsOfSizeN()
```
- Method Detail
  - applyTo
```
public boolean applyTo(Puzzle puzzle)
```
    Description copied from class: Rule
    
    Method to apply this Rule to the argument Puzzle.
    
    Overrides:
    
    applyTo in class RuleOfElimination
    
    Parameters:
    
    puzzle - The Puzzle to solve.
    
    Returns:
    
    true if this Puzzle is modified; false otherwise.