First recorded by Martine Clemenceau (FRA #50 1981).
Also recorded (as “Immer Mehr”) by Milva (1982).
Hit version by Laura Branigan (US #7 1983).
From the wiki: “‘Solitaire’ originated as a 1981 recording in French by Martine Clemenceau for whom ‘Solitaire’ was a modest hit in France, peaking at #50 on the French Pop chart. Written by Clemenceau herself, the French version of ‘Solitaire’ concerned a recluse who shuts himself away from a world moving toward nuclear war. In 1982 ‘Solitaire’ was also rendered in German as ‘Immer Mehr’ and recorded by Milva.