White to move here can mate in just two moves. So whatever Black does after White's Key, White mates.
It is not an easy problem. In some way you have to "break through your own barriers"...
it took me a long time before realizing the chess board is in fact larger than my own head allowed it to be.
Did you find the solution before clicking on the diagram?
It's a neat problem by the famous and very productive composer Samuel Loyd, and was published in the Baltimore Herald back in 1880 when chess was still considered to be cool.
4 weeks ago