XG? Love it hate it

[everton1953]

Yeh wa?? Much more interesting is whether the phantom spitter at Analfield was Carragher who has known history in that particular field of expertise.

 

[Ring master]

This XG thing is one thing i have never understood and never take any notice of, despite been one to look at the odd stat and co

 

[chrismpw]

Irrelevant bubbles.

 

[everton1953]

Could it have been Carragher??

 

[Zezti]

To start with it was literally where the shot was taken from (the closer to goal and more central the higher the value) and the body part (head or foot).

It was calculated by taking the coordinates of a shot (and body part used) from hundreds of thousands of logged shots and saying if a goal was scored or not. So if 100/1000 shots were scored from that location then that equals a 0.1xg shot.

That did actually work, teams that got better shots from better locations score more goals.

However that had obvious problems, there is a huge difference between a shot into an empty net from 20 yards and a shot from 12 yards with 10 defenders in the way, but the "naive" model would rate the open goal shot as harder.

So then some providers added in where the shot was placed (called post-shot xG) which took into account goalkeeper position and where the shot went.

Now some take snapshots that plot where the defenders were positioned when the shot was taken which makes it more accurate on a game by game basis.

Every club uses xG to some extent but it is normally part of a package of stats used to monitor performance. It is just new terminology for "we had the better chances" to be honest.

Good explanation.

As far as I'm aware, its the best attempt to quantify a team's attacking performance. Not perfect, no stat is, but definitely a fair indicator.

 

[johntmorgan67]

As useful as a dose of AIDS … get in the bin

 

[tellmema]

'(pass x pass) + mistake / goal threat = GOAL (y/n)' has been my workings for the last 5 years now.

EXCELlent theory.

 

[Toff33Blues99]

It's a steaming pile of horse manure , invented by the clueless football yooth whom have no understanding of the game. So have invented some nonsense while talking to each other on head sets in their ma basement thinking it will impress girls who wont talk to them anyway because they spend 10 hours a day building a pointless tower on minecraft