public int getNumber(int x, int y)
{
int row = (int)Math.Floor((double)y / 3);
int col = (int)Math.Floor((double)x / 3);
BoardBox bb = board[col, row];
int minorX = x - (col * 3);
int minorY = y - (row * 3);
return(bb.getNumber(minorX, minorY));
}
public bool canPlaceAtSubGrid(int subX, int subY, int relX, int relY, int num)
{
BoardBox subGrid = board[subX, subY];
int checkNum = subGrid.getNumber(relX, relY);
if (checkNum == 0)
{
bool numExists = false;
for (int x = 0; x < 3; x += 1)
{
for (int y = 0; y < 3; y += 1)
{
if ((x == relX) && (y == relY))
{
continue;
}
checkNum = subGrid.getNumber(x, y);
if (checkNum == num)
{
numExists = true;
break;
}
}
if (numExists)
{
break;
}
}
if (!numExists)
{
// winner!
return(true);
}
}
return(false);
}