PBEM Games take 3 rounds of email per turn. A moves turn 1, B moves and processes turn 1, A views turn 1, B views turn 1 and moves turn 2, A moves and processes turn 2, B views turn 2, A views turn 2 and moves turn 3. Wash, rinse, repeat. AFAICT this is to prevent cheating by either player. If you are not sitting by your computer and processing several turns in a night, it's just a matter of math. You will get, at one segment a night, two turns a week. It will take twenty weeks to complete the Valley of Trouble from the Demo by email.