public static bool CheckTop(int size, Matchfield matchfield, char aktPlayer, char nxtPlayer, int yPos, int x)
        {
            bool stoneOfNextPlayerFound = false;

            for (int y = yPos - 1; y >= 0 && y <= size - 1; y--)
            {
                char currentFieldValue = matchfield.GetField(y, x);

                if (currentFieldValue == ' ')
                {
                    return(false);
                }

                if (currentFieldValue == nxtPlayer)
                {
                    stoneOfNextPlayerFound = true;
                    continue;
                }

                if (currentFieldValue == aktPlayer && stoneOfNextPlayerFound)
                {
                    return(true);
                }
                else
                {
                    return(false);
                }
            }
            return(false);
        }
        public static bool CheckBottomRightNextTurn(int size, Matchfield matchfield, char aktPlayer, char nxtPlayer, int yPos, int xPos)
        {
            bool stoneOfNextPlayerFound = false;

            for (int y = yPos + 1, x = xPos + 1; x >= 0 && x <= size - 1 && y >= 0 && y <= size - 1; x++, y++)
            {
                char currentFieldValue = matchfield.GetField(y, x);

                if (currentFieldValue == ' ')
                {
                    return(false);
                }

                if (currentFieldValue == aktPlayer)
                {
                    stoneOfNextPlayerFound = true;
                    continue;
                }

                if (currentFieldValue == nxtPlayer && stoneOfNextPlayerFound)
                {
                    return(true);
                }
                else
                {
                    return(false);
                }
            }
            return(false);
        }