 Pari gbolohun ti o tẹle: Aarin ijọba ti awọn aṣaju Chess World jẹ akoko laarin Oṣu Kẹta Ọjọ 24, Ọdun 1946 ọjọ ti iku Alexander Alekhine ati Oṣu Karun Ọjọ 17, Ọdun 1948 nigbati Mikhail Botvinnik ṣẹgun : ìdíje àkànṣe kan. 