Spent 27 minutes of my time this evening working out the solution to this beautiful endgame puzzle by Leonid Kubbel. It was time we’ll spent!
For those who are unfamiliar with Kubbel’s work, he composed many of the finest endgame studies of the early part of the twentieth century. In fact, Kubbel likely could have been one of the dominant chess masters of his time period had he not spent so many hours working on his more than 1500 endgame studies! Lucky for us that he did because his endgame compositions (such as the one above) regularly stretched the boundaries of what is possible on the chessboard in ways his chess games never could have.