Die Schwalbe
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COMMENTDATE%3E%3D20200919 AND NOT K%3D%27Hilfsr%C3%BCckz%C3%BCger%27 AND K%3D%27Grimshaw%27 AND G%3D%273%23%27 AND NOT S%3D%27Michael Keller. Ein Meister der Schachkomposition %5BChlubna%5D%27 AND G%3D%273%23%27
atomic expression must have form 'field = value' [COMMENTDATE % $$NUMBER0 E % $$NUMBER1 D20200919]