Met andere woorden: P' = P (zie inleiding, vergelijking 3.)

Op sommige plaatsen, inclusief de NBB, gebruikt men uit traditie deze methode nog.
David desJardins gelooft werkelijk dat het de beste methode is.

You play a bunch of boards and, being a perfect judge of how the rest of the field will play, conclude at the end of play that you expect to score exactly 60% on average against this field. Of course, you will score better on some days and worse on others, but on average let's say you are right and you will score exactly 60% if you could average over many repeated trials. Then the estimator above is unbiased if, when unbeknownst to you some other pair somewhere else in the room had a fouled board and scored average, you *still* expect to score exactly 60% on average, if the event were repeated many many times.

Oftewel, als je in een groep 60% verdient, verdien je in alle groepen, ongeacht grootte, 60%.