FIBS Board backgammon forum

is there a generally exepted definition (e.g. %) for a match equity swing?

how many equity swings will in average appear in a game of a certain length (e.g. match length 5 points) ?

The term "match equity" is just the match winning percentage expressed as a decimal.  So at the beginning of the match, your equity is .5.  Once you roll the dice and start the match the player who won the opening roll has an advantage, so his match equity is then more than .5.

Subsequent to that, every time  something happens the match equity changes, or "swings".  Sometimes the changes are small, and sometime the changes are large.  Gnu, XG, etc put labels on various swings due to the dice alone (lucky, very unlucky, etc.) but there's no definition of threshold that I know of for the term "swing".

http://www.bkgm.com/gloss/lookup.cgi?match+equity and
http://www.bkgm.com/gloss/lookup.cgi?pat=equity