David Brain is a professional cruciverbalist and puzzle designer.
They regularly playtest nearly every Friday at Waterloo, London at a public event now organised through PlaytestUK.
David has a sharp sense of humour, a kind heart, and good sensibilities for the maths and ramifications of a changing game element. David's background allowed him to provide invaluable help during the creation of the Wibbell++ deck.
David lives with a cat, who is alarmed by most voices.