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!
Update to statistics! Added details (see below) for the number of fairy pieces/families/conditions used (min:1, max:1+2). Only 1 fairy element…
A great job done by Kjell in the award with his detailed comments, comparisons and analyses. As Julia said: "More…
Thank you, Sebastien! I had my head in the skies, back in the 80s too, for Halley's Comet! Solution: 1.cxd3…
There are a total of 6 such variations: Ra3, Rc4, Bc5, Rd3, Re1 and Be3. These are usually not listed…
Sorry! The ideas and work are all by Thomas, Maryan and Chris. I only put their documents together for Julia…
Moved and deleted.
Meredith? ?