According to Hoyle

Perfect in every way / To the king's taste / To the queen's taste / To the highest standard / By the book


A regola d'arte

Con tutti i sacri crismi / Con tutte le virgole / Secondo le regole


Meanings
With strict adherence to a set of rules; fairly and honorably; to perfection

Examples
We don't want to lose this case over any legal technicalities; everything must be done strictly according to Hoyle
Non possiamo rischiare di perdere la causa per cavilli legali; bisogna fare un lavoro con tutti i sacri crismi

We paid a bundle for the new hard-wood floor, but there's nothing we can complain about: it is a job done to the highest standard
Abbiamo pagato un sacco per il nuovo parquet, ma non c'è niente da dire: è un lavoro fatto a regola d'arte!

The Prime Minister said that the situation is critical but under control... all according to Hoyle!
Il Primo Ministro ha dichiarato/ che la situazione è sì critica, ma sotto controllo... tutto secondo le regole

Origin
Edmond Hoyle was an expert on card games, especially on whist, a forerunner of contract bridge. In 1742 he published "A Short Treatise on the Game of Whist", which for more than a century was used to settle disputes about the rules. Later on, his name was used in the title of a reference book containing rules for many card games and ever since "according to Hoyle" has meant according to the rules of the game