![php sudoku generator algorithm php sudoku generator algorithm](https://www.mdpi.com/algorithms/algorithms-13-00171/article_deploy/html/images/algorithms-13-00171-g003.png)
$next_move = remove_attempt($next_move,$attempt) $attempt = determine_random_possible_value($next_move,$what_to_try) $next_move = scan_sudoku_for_unique($sudoku)
#Php sudoku generator algorithm full#
The value at n-th position is the one you will find on the table at row floor(n/9) and column n%9.Ī value from 1 to 9 represents a know number of a Sudoku table, while a zero represents an unknown one.įor this reason, an array filled only with zeros like the one in the script will generate a new, full Sudoku. It’s an array ( line 193) with 81 values representing positions from 0 to 80. The only thing you need to know is how I represent the Sudoku table inside the script. The script consists in a set of functions that emulate the “human way” to solve a Sudoku game, with trials and errors, using backtracking. The puzzle setter provides a partially completed grid. The objective is to fill a 9Ã-9 grid so that each column, each row, and each of the nine 3Ã-3 boxes (also called blocks or regions) contains the digits from 1 to 9 only one time each. If you don’t know what is a Sudoku, Wikipedia says is a logic-based number-placement puzzle.
![php sudoku generator algorithm php sudoku generator algorithm](https://www.codeproject.com/KB/game/SudokuGen/Example1_2_.jpg)
This is an old project for a class held in 2005.Īt that time, Sodoku game was very popular in Italy, and I saw quite a lot of Flash games based upon it.