http://math.uchicago.edu/~wald/bday_qa.pdf
(Written for a birthday.)
Many of my friends from the National Puzzlers' League self-publish puzzles on irregular schedules. I thought it would be a good thing to have a "blog" (such as it is) that simply consolidates announcements of such puzzles. And here it is.
http://math.uchicago.edu/~wald/bday_qa.pdf
(Written for a birthday.)
http://math.uchicago.edu/~wald/thanksgiving15.pdf
(Brought to a pre-Thanksgiving dinner.)
http://math.uchicago.edu/~wald/dab.html
(Unofficial warmup cryptic written for my teammates before the 2016 MIT Mystery Hunt.)