Where clause in set analysis

[chibi]

Hi i'm trying to do this. 

sum(game_session_count) where count(distinct sales_session_game_link_id)

Anyone know whats the correct formula? 

[anat]

https://help.qlik.com/en-US/qlikview/May2021/Subsystems/Client/Content/QV_QlikView/ChartFunctions/Se...

[anat]

=sum({<game_session_count = {"=count`(distinct sales_session_game_link_id) >1"}>} distinct game_session_count)

[chibi]

So do I create a variable for the count measure and put it inside the sum? How does it work I understand the link given but it does not help show how two measures sum and count can be in one expression 

[chibi]

It returned a value of zero. {"=count`(distinct sales_session_game_link_id) >1"}>}  what does this part mean >1?

also why is there a distinct game_session_count?