Cheryl's Birthday
This is an incremental work compiling and solving existing puzzles for educational or recreational purposes.
The paper presents four logic puzzles, including 'Cheryl's Birthday', and provides their solutions, with contributions from multiple authors and references to related works.
We present four logic puzzles and after that their solutions. Joseph Yeo designed 'Cheryl's Birthday'. Mike Hartley came up with a novel solution for 'One Hundred Prisoners and a Light Bulb'. Jonathan Welton designed 'A Blind Guess' and 'Abby's Birthday'. Hans van Ditmarsch and Barteld Kooi authored the puzzlebook 'One Hundred Prisoners and a Light Bulb' that contains other knowledge puzzles, and that can also be found on the webpage http://personal.us.es/hvd/lightbulb.html dedicated to the book.