To analyze pass out deals we can only use HCP and long suit points (HCL for high card length point). We need to establish this as a control situation to compare different opening criteria for regular 1 opening.
This is the ultimate pass out deals with almost no advantages for either side. They consist of only 0.5% of all the hands. Each side can make on the average 7.9 tricks.
This is the most conservative pass out deals. Many players will open some of the hands which have 12 high card length points. This provides us an upper bound for a possible pass out deal. They consist of about 3.9% of all the deals. Each side can make on the average 8.2 tricks.