In 1957, he lost to Vasily Smyslov, but regained the title in a rematch in 1958.
Noong 1957, natalo siya kay Vasily Smyslov, ngunit nakuha niyang muli ang korona matapos ang muli nilang paghaharap noong 1958.
Data source: CCMatrix_v1 In 1957, he lost to Vasily Smyslov, but regained the title in a rematch in 1958.
Noong 1957, natalo siya kay Vasily Smyslov, ngunit nakuha niyang muli ang korona matapos ang muli nilang paghaharap noong 1958.
Data source: WikiMatrix_v1 
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