![]() ![]() The first version of this method appears to have been developed by Alan Ryder in 2004 here. The earliest versions were often described as “shot quality” models, attempting to more or less “weight” shot attempts using the data that was available. ![]() All of these models have their roots in work done over a decade ago. The models/metrics we’re familiar with today generally use multiple seasons of RTSS data (NHL play by play data) and often include over 20 variables as inputs. xG now sits neatly next to Corsi and Fenwick as a metric that is quite useful for both team and player evaluation. Note: this article was originally published on Įxpected Goals (xG) as a metric has become common-place in hockey analytics circles over the past few years. ![]()
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