Cooperative deck-building game Harry Potter: Hogwarts Battle is a favourite family game of ours, but I'd never tried to play it solo. The game can drag on very long, which is not much of a problem when you're having fun together, but when I am on my own, I usually reach for something else. Also I have never really felt like playing this two-handed. But yesterday Usaopoly posted designer Kami Mandell's new single-handed solo rules on their blog, so I finally played alone. Firs