Die Schwalbe
The search command is not correct.
COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT A='Hagemann, Wilhelm' AND S='Marshall's Chess "Swindles"'
atomic expression must have form 'field = value' [( COMMENTDATE >= $$NUMBER0 AND NOT K = $$STRING1 AND NOT A = $$STRING2 AND S = $$STRING3 S CHESS " $$STRING4]