Chess premiered at Prince Edward Theatre, London, UK on Wednesday 14 May 1986 attended by Benny and his wife Mona and Björn and his heavily pregnant wife Lena.  

(Frida also attended but arrived through a side door and there is no footage of her.  She had blonde hair at the time).

News footage:

1. Music Box, Sky TV, UK
   A short news clip.  Björn and others (Sarah Brightman, Murray Head and Barbara Dickson) were interviewed by reporter Steve Blacknell. Rock star Rod Stewart was also there.
    
2. Rapport, Sweden
   Report by Ingrid Thörnqvist showing Benny and Björn arriving at the theatre and being mobbed.  Tommy Körberg and Benny are interviewed.  Comments from Chief Drama Critic for The Sunday Times, John Peter.
    
3. Aktuellt, Sweden
   Report by Ingrid Thörnqvist.  Interviews with Tommy Körberg and Björn. Comments from Chief Drama Critic for The Guardian, Michael Billington.

Thanks to Jozsef, Steve Jacks and Nick Marks.