▁in ▁all ▁Ch ess ▁Olymp i ads ▁from ▁ 1 9 3 7 ▁to ▁ 1 9 6 8 . ▁He ▁won ▁two ▁individual ▁silver ▁med als ▁( 1 9 3 9 , ▁ 1 9 5 0 ) ▁and ▁one ▁bronze ▁( 1 9 6 8 ). ▁ ▁At ▁the ▁beginning ▁of ▁World ▁War ▁II ▁( 1 9 3 9 – 1 9 4 0 ), ▁he ▁played ▁in ▁tournament s ▁in ▁the ▁Netherlands . ▁In ▁ 1 9 4 0 , ▁he ▁won ▁joint ly ▁with ▁Sal o ▁Land au ▁and ▁Nicola as ▁Cort le ver ▁in ▁Lee u ward en , ▁took ▁ 2 nd , ▁behind ▁Max ▁Eu we , ▁in ▁Amsterdam ▁( V V GA ), ▁and ▁tied ▁for ▁ 3 rd – 4 th ▁in ▁Amsterdam ▁( V AS , ▁Hans ▁K m och ▁won ). ▁After ▁the ▁German ▁invasion ▁of ▁the ▁Netherlands ▁in ▁May ▁ 1 9 4 0 , ▁his ▁name ▁did ▁not ▁appear ▁in ▁any ▁tournament ▁in ▁the ▁occupied ▁Netherlands ▁because ▁of ▁his ▁Jewish ▁origin . ▁After ▁the ▁war , ▁he ▁took ▁first ▁place ▁at ▁Ho og ov ens ▁B ever w ijk ▁in ▁ 1 9 4 8 ▁and ▁at ▁Madrid ▁ 1 9 5 1 ▁with ▁ 1 2 . 5 / 1 7 , ▁ahead ▁of ▁H erman ▁Ste iner , ▁H erman ▁Pil nik , ▁and ▁O ss ip ▁Bern stein . ▁ ▁Pr ins ▁qualified ▁for ▁the ▁ 1 9 5 2 ▁Inter zon al ▁and ▁was ▁Dutch ▁Champion