October 25th, 2015

PB on single letter abbreviations (at 25 October 2015)

The Mephisto rule isn't "anything goes", but "anything in Chambers goes" - as for the rest of the puzzle. All cryptic crosswords use single-letter and other abbreviations, but their rules about what's allowed vary. The Times crossword has had a fairly short list for one-letter ones (and AFAIK still does), which is mostly the ones in both Collins and the Concise Oxford. I'm currently prepared to use anything from Collins or the Oxford Dictionary of English (preferably not obscure ones from both in the same puzzle), plus a few from real life - N for no and Y for yes, and the card suit ones - I was surprised to notice that H=Hearts needs Chambers, and with a bridge column on the same page it seems daft to disallow them.