A reviewer was describing a new form and this malaphor was born.  It is a congruent conflation of “according to Hoyle” and “up to snuff”, both expressions meaning something that is to acceptable standards or rules.  The phrase “according to Hoyle” refers to 17th-Century British writer Edmond Hoyle, who wrote extensively on the rules of card games.  A big thanks to Mary Webster for sharing this one.