Tadashi Wakashima has confirmed over Twitter that he is indeed the inventor! Thanks to "antilles" for posting the question!
Kostas Prentos has kindly informed us that he is not the inventor of the fairy condition "half-check", as mentioned in…
As members of the Chess problems and studies Discord server are aware, Reto has been quietly developing and testing this…
Walter, We are happy to welcome you to the project. Please send a test mail to nshram at gmail dot…
Joost, Thank you! What you are referring to is an attribute. Quoting from Maryan's recent document: "...an attribute is simply…
Thanks for your interest, Walter! Though we have covered more than 90% of the elements supported by Popeye and a…
See the first images from the JWST released today by NASA: https://webbtelescope.org/news/first-images/gallery
I think all impossible situations are illegal. But not vice-versa. For example, a side can expose his King to check:…
Hello, Walter. Welcome to problems, fairies and retros! The questions you raise are not new. You may find some related…
I thought the treatment of Kings was missing in the definition, but it's there!