Originally posted by heinzkat
It is an O.K. puzzle indeed. Is this a FabianFnas original composition? [it appears somewhat familiar]
No, this is not a composition of my own. It's called "Lord Dunsany's Chess problem".
SwissGambit was first t solve this problem, he sent me the correct solution in a PM. (Thank you for not spoiling it for other solvers.)
I also got the correct solution via PM from Jirakon. Well done, you too.
I leave the solution for a while, giving more interested solvers to find the solution.