A few years ago I made my PhD in to a pen-and-paper puzzle book. Here it is, in full. Contact me if you want it in pdf format.

Complete the puzzles by deciding which grid-squares to cover with each

For each puzzle you are given some tiles and a grid. Each tile can only be placed in a certain row or column, and no four tiles are allowed to meet. It’s challenging but the whole book is doable. Good luck!

Tomoku! 80 Challenging Puzzles by Alejandro Erickson from Alejandro Erickson