Methode: sudoku_guess::guess()

<?php
 
function guess() {
  if (12 < time()-$this->chkTime) {
    $this->arrZeilen = $this->arrStart;
    $this->aktualisieren();
    return true;
  }
  //Backup
  if (!is_array($this->arrStart[0]))
    $this->arrStart = $this->arrZeilen;
  $this->arrBackup = $this->arrZeilen;
  //Ein Wert wird geraten
  $tmp = 0;
  $z = $this->count1;
  for ($x=0;$x<9;$x++) {
    for ($y=0;$y<9;$y++) {
      if (9 < $this->arrZeilen[$x][$y] && 0 == $tmp) {
        if (0 == $z) {
          $str = substr($this->arrZeilen[$x][$y],0,1);
          $this->arrZeilen[$x][$y] = $str;
          $tmp++;
        } else {
          $z--;
        }
      }
    }
    if (0 != $tmp)
      break;
  }
  //Mit dem geratenen Wert wird weitergerechnet
  $this->solve();
  //Ergebnis wird ueberprueft
  $this->check();
  //Wenn das Ergebnis falsch ist, wird mit dem Backup der naechste
  //Wert geraten
  if ('error' == $this->status) {
    $this->count3++;
    if (10 < $this->count3) {
      $this->arrZeilen = $this->arrStart;
      $this->count1    = $this->count2 + 1;
      $this->count2    = 0;
      $this->count3    = 0;
      $this->guess();
    } else {
      $this->arrZeilen = $this->arrBackup;
      $this->count1++;
      $this->guess();
    }
  //Ist die Loesung noch nicht eindeutig, wird weitergeraten
  } elseif ('unfinished' == $this->status) {
    if (0 == $b) {
      $this->count2 = $this->count1;
      $this->count1 = 0;
      $this->guess();
    } else {
      $this->count1 = 0;
      $this->guess();
    }
  }
}
 
?>