func (b *Board) Size() (int, int) {
	x := b.size*tileSize + (b.size+1)*tileMargin
	y := x
	return x, y
}
func (b *Board) Size() (int, int) {
	x := b.size*tileSize + (b.size+1)*tileMargin
	y := x
	return x, y
}
func ( b * Board ) Size ( ) ( int , int ) { x := b . size * tileSize + ( b . size + 1 ) * tileMargin y := x return x , y }
// Size returns the board size.
Size returns the board size .