saper-game (free zero cells)

def openAroundZero(self, c):
        cell = self[c.x][c.y]
        k = cell.x
        n = cell.y
        if k > 0:
            if n > 0:
                if self[k-1][n-1].value == 0 and self[k-1][n-1].isOpened == False:
                    self[k-1][n-1].isOpened = True
                    self.openAroundZero(self[k-1][n-1])
                else:
                    self[k-1][n-1].isOpened = True
                if self[k-1][n].value == 0 and self[k-1][n].isOpened == False:
                    self[k-1][n].isOpened = True
                    self.openAroundZero(self[k-1][n])
                else:
                    self[k-1][n].isOpened = True

            if n < self.size - 1:
                if self[k-1][n+1].value == 0 and self[k-1][n+1].isOpened == False:
                    self[k-1][n+1].isOpened = True
                    self.openAroundZero(self[k-1][n+1])
                else:
                    self[k-1][n+1].isOpened = True
        if n < self.size - 1:
            if self[k][n+1].value == 0 and self[k][n+1].isOpened == False:
                self[k][n+1].isOpened = True
                self.openAroundZero(self[k][n+1])
            else:
                self[k][n+1].isOpened = True

        if k < self.size - 1:
            if n < self.size - 1:
                if self[k+1][n+1].value == 0 and self[k+1][n+1].isOpened == False:
                    self[k+1][n+1].isOpened = True
                    self.openAroundZero(self[k+1][n+1])
                else:
                    self[k+1][n+1].isOpened = True
            if self[k+1][n].value == 0 and self[k+1][n].isOpened == False:
                self[k+1][n].isOpened = True
                self.openAroundZero(self[k+1][n])
            else:
                self[k+1][n].isOpened = True

            if n > 0:
                if self[k+1][n-1].value == 0 and self[k+1][n].isOpened == False:
                    self[k+1][n-1].isOpened = True
                    self.openAroundZero(self[k+1][n-1])
                else:
                    self[k+1][n-1].isOpened = True
        if n > 0:
            if self[k][n-1].value == 0 and self[k][n-1].isOpened == False:
                self[k][n-1].isOpened = True
                self.openAroundZero(self[k][n-1])
            else:
                self[k][n-1].isOpened = True