Sathishkumar Natesan PRO said over 3 years ago on Two-Way SMS Conversation :
Hi David, Loved the episode. Really nice job covering the topic in 20 odd minutes.

One minor observation in Game::Turn#call, the fallback 'else' will never be reached, since we apply `to_i` on the `guess`. We will be sending a misleading reply back in case a non-numeric input is passed.