ball.game.sudoku

Class RuleOfNIdenticalCellsOfSizeN

java.lang.Object

ball.game.sudoku.Rule

ball.game.sudoku.RuleOfElimination

ball.game.sudoku.RuleOfNIdenticalCellsOfSizeN

@ServiceProviderFor(value=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).

Version:

$Revision: 5285 $

Author:

Allen D. Ball

Constructor Summary

Constructors

Constructor and Description
RuleOfNIdenticalCellsOfSizeN()

Method Summary

Modifier and Type	Method and 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.