Move 19 Recap

The moth and Sasha; messages from Kaliyan and Yehan

Sasha and the moth agree, using a logarithmic scale, that they will sing more loudly once the ship has left the station. Sasha notices that the moth is quieter when contemplating mathematical notation, and asks Yehan whether giving it puzzles is a good idea; Yehan agrees. Sasha sends the moth a problem set that guides the student through an introduction to magic squares and coding theory.