#chess solitaire

In today's blog post, we say goodbye to a friend and fellow puzzler, David Lindsey.

The puzzle world is a relatively small one, and sadly, over the last month or so, it has grown a bit smaller. I know some of you are already aware of the passing of Raymond Smullyan, the mathematician and puzzlesmith who popularized, among other things, the logic puzzle known as “The Lady or the Tiger?” What you may not know is that a long-time member of the Penny Dell Puzzles family also passed…