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<?php declare(strict_types=1);
namespace Stratadox\PuzzleSolver\Puzzle\Sudoku;
use Stratadox\PuzzleSolver\Move;
use Stratadox\PuzzleSolver\Puzzle;
use Stratadox\PuzzleSolver\Moves;
final class SudokuPuzzle implements Puzzle
{
/** @var Sudoku */
private $sudoku;
/** @var Moves */
private $entries;
private function __construct(Sudoku $sudoku, Moves $entries)
$this->sudoku = $sudoku;
$this->entries = $entries;
}
public static function fromArrays(array ...$arrays): Puzzle
return new self(new Sudoku(...$arrays), Moves::none());
public function isSolved(): bool
return $this->sudoku->isFull();
public function movesSoFar(): Moves
return $this->entries;
public function representation(): string
return (string) $this->sudoku;
public function possibleMoves(): Moves
return $this->sudoku->possibilitiesForNextEmptyPosition();
public function afterMaking(Move ...$entries): Puzzle
$new = clone $this;
$new->sudoku = $new->sudoku->withFilledIn(...$entries);
$new->entries = $new->entries->add(...$entries);
return $new;
Stratadox /
PuzzleSolver
