|City:||Seattle, WA, USA|
|Venue:||Seattle Center Coliseum|
|Date:||September 3, 1982|
Here is a glowing review of the show from the Seattle Times (the picture in the article is from 1980; thanks to Rick van der Wal for pointing it out).
The review states that Sheer Heart Attack was performed (most likely in the encore, as it is mentioned alongside We Will Rock You and We Are The Champions), bringing some clarity to a very incomplete picture of what the band were up to later in the tour.
This is the last known performance of Sheer Heart Attack until 1984, when it would be performed only a few more times at the beginning of the European tour.