Hidden Code Postcard

Image found at www.telagraph.co.uk

The image above is believed to be a post card that experts believe contain a hidden code within it.
But it isn't that clear cut the message links to the game of chess. How Im not sure but this is another area of cold war that has potential. I like the sound of illustrating a message that has a hidden message within the image like a sea side postcard, another route to investigate, there is so much potential within the era of the cold war.