Arguably his most important contribution was a small booklet he wrote in 1742 for the card game Whist, titled “A Short Treatise on the Game of Whist.” From then onwards, the rules detailed in this booklet became authoritative for the game for the next hundred years.
Edmond Hoyle was a lawyer by profession, but is best-known for codifying the rules for many board games - such as backgammon and chess, and card games.