Here is a solitaire type environment for students to experiment
with. It requires forward planning and logical thinking.
The narrator Christopher in the novel The
Curious Incident of the Dog in the Night-time
Conway's soldiers is "a good mathematics problem to do in your head
when you don't want to think about something else because you can
make it as complicated as you need to fill your brain by making the
board as big as you want and the moves as complicated as you want"
(Mark Haddon 2003).
If students have enjoyed this problem they may be interested in
mysteries: The Solitaire Advance
and Conway's Angels and