Copy of puzzle #5967

I have been active in the puzzle section from the very beginning and I remember... when I have seen something over five times before   this is one of those puzzles that keeps being reposted in all kinds of versions. Actually 5967 is a repost of one I posted earlier as well - but it is the only entry in the collection that has a correct combination of the right position (white's castling rights and pawn formation) and right solution (the way it was played by Ed. Lasker took one move more and everybody posts that as the solution main line). Later today, I'll find the other versions that have survived as well.