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I know for a fact that chess games, whenever played, are in the public domain, but does anybody know whether the same is true of problems? I suspect not, although the Yarosh and Drumare problems referred to in the article are quite widely reproduced. I'd love to give diagrams for them, but don't want to run into copyright problems. I've written a couple of emails to people, but if anybody knows whether they're OK to put here, let me know and I'll stick them up (I have the .pngs on my computer, waiting to go). --Camembert

I can answer my own question: [1], from the British Chess Problem Society (of which I'm a lapsed member) says "If you are a chess writer and want to publish a chess problem, feel free to do so. There is no copyright on chess problems. But do acknowledge its composer and where it was first published (its source)". I'll put the Yarosh and Drumare problems up later tonight. --Camembert

I realise that the solutions given here are not complete - if somebody wants to provide them in full, I'd suggest putting them on the image page rather than in the article (with a pointer to where they are of course), in order to avoid cluttering the article up too much. --Camembert

The diagram given for Yarosh's second problem is incorrect -- it's the same as the first. 84.70.141.90 11:05, 13 June 2006 (UTC)[reply]

Never mind, I found the correct diagram and substituted it for the other. 84.70.141.90 11:17, 13 June 2006 (UTC)[reply]

The first Yarosh problem—important!—differs on one square from the same one on the linked page of Tim Krabbé: We have an empty square for f2, Krabbé has a WP.

Also, several of the external links are dead. The ChessBase one can probably be repaired. --72.70.94.243 (talk) 17:10, 18 March 2014 (UTC)[reply]