Stuff
public text v1 · immutable(SELECT s.score as myscore,s.teamID_FK as me,s.opp_teamID_FK as them from score s where s.teamID_FK=23)
UNION
(SELECT t.score as theirscore,t.opp_teamID_FK as me,t.teamID_FK as them from score t where t.opp_teamID_FK=23)
yields:
myscore me them
1770 23 25
1210 23 30
2080 23 29
1970 23 25
1650 23 30
900 23 29
theirscore doesn't even appear!