Dee ihe na-esote paragraf a - Na Helsinki 1952, ọ gbara bọọdụ nke abụọ, ma merie ọla edo n'otu n'otu na 101⁄2/13. Mgbe m nọ n'Amstadam n'afọ 1954
, ọ nọkwa na bọọdụ nke abụọ, were akara 9/12, wee were ọla nchara n'otu n'otu. Na Moscow 1956, o nwetara 81⁄2/13 na bọọdụ nke abụọ, mana ọ nwetaghị ihe nrite. Na Munich 1958, o mere 91⁄2/13 na bọọdụ nke abụọ, nke dị mma maka ọlaọcha onye ọ bụla. Na Leipzig 1960, a tụbara ya na nchekwa mbụ, wee mee akara dị ukwuu nke 111⁄2/13, nke meriri nrite ọla edo.