Juan Vinuesa
In international tournaments , he shared 3rd at Buenos Aires 1934/35 ( the 5th South American Chess Championship , "Torneio Sulamericano" , Luis Piazzini won ) , tied for 3rd-4th at Mar del Plata 1936 ( the 6th "Torneo Sudamericano" , Isaias Pleci won ) , tied for 4-7th at Rosario 1939 ( Vladimirs Petrovs won ) , and tied for 10-12th in the Mar del Plata 1941 chess tournament ( Gideon Ståhlberg won ) . 
<triplet> Mar del Plata 1941 chess tournament <subj> 1941 <obj> point in time