chess online

puzzle #4412 is the original

If you don't agree with me as authority (which is agreeable because my only input source is the Internet too), then at least you could maybe trust databases www.bstephen.me.uk, www.yacpdb.org, www.softdecc.com (ok, those cannot be completely reliable either) or John M. Rice, the editor of the Problemist...

www.chessbase.com

I don't know where you got the name of Greco from, did he republish this diagram? He lived somewhere in the 16th or 17th century...? This problem apparently goes back to the 13th/14th century.

Thank you, 9422m, for not taking this so seriously! My point was that this puzzle is so simplistic, it could easily go back to the very early stages of chess. There was no credit to a composer given in #4412, and I didn't think it worth the time to research who composed it and which version was the original --who cares? I think the first time I saw this problem was in a Reinfeld book, I believe the version I gave with the kings on their original squares (there is no need to move them elsewhere, after all).

Kingdawar, I do not dispute your authority on chess problems. You have proven time and again that you can do a search and find the author of almost any published author. I know it's not hard to do, but since I'm not writing a book on puzzles, I don't take the time to look up every puzzle with an unknown composer.