About this site

Auction45s.com is a free guide to playing Auction 45s, written for people learning the game and for tables trying to settle an argument. It's published by Tricksmith Games, a small studio that makes card games.

Where the rules come from

45s has no governing body or official rulebook. The rules here were put together by comparing published write-ups of the game from Atlantic Canada and New England, general card-game references, and players' accounts of how they learned it. Where sources agree, we give that rule. Where they disagree, we say so and describe each version.

Corrections and regional rules

If your family, club or region plays differently, or you spot a mistake, we'd like to hear about it. Email support@tricksmithgames.com and tell us where you play and how.

Using this material

You're welcome to print the pages for your own table, club or card night. Please link back rather than copying text onto another website.

Last updated November 10, 2026.