diagonal: Tatai was the strongest Italian chess player following Monticelli and Paoli until Mariotti's achievement in the 1970s, as well as Béla Tóth (also in the 1970s/80s), sometimes overlooked.
Reggio Emilia 1965-66, =3rd; Venice 1966, =3rd; Malaga (Costa del Sol) 1967, =3rd; Winner Amsterdam IBM-<B> 1968; Olot 1968, =2nd; Venice 1969, =2nd (behind Hort, joint with Benkö, Lengyel, Robatsch, Taimanov, and Saidy, in alphabetical order); Winner Monte Carlo-<B> 1969, joint with Győző Forintos; Malaga (Costa del Sol) 1970, =3rd; Venice 1971, =3rd (behind Browne, then Mariotti, joint with Hort, ahead of Kavalek); Winner Torneo Magistrale Madonna di Campiglio 1972; Winner Amsterdam IBM-<B> 1976, joint with Josef Prybil; Bratto Open 1982, shared 1st (Mario Sibilio won on tie-break); Winner Dubai (closed) 1984, 1st-3rd (above Keene, among others); Reggio Emilia 1983-84, =2nd (behind surprising winner Karel Mokry, joint with Krunoslav Hulak, but above =5. Spassky, and =5. Nunn); =2nd at the Capablanca Memorial in Cienfuegos 1984, II. Tournament (behind Jesus Nogueiras); Winner Rome-A (Banco di Roma series) GM Invitation 1984, 1st, alongside with Gyula Sax, a big success for Tatai
(http://storiascacchi.altervista.org...), other winners include Korchnoi, Smyslov, Vaganian, Andersson, or Pinter.
Those were the days when an international invitation tournament of note also offered a strong closed B-group, as Wijk aan Zee (Tata Steel) still does today.
Won a match in 1977 between the then leading two Italian players: IM Tatai versus GM Mariotti (the first Italian born GM, awarded in 1974) with 4.5-3.5 in Rome. A previous encounter between Tatai and Mariotti was drawn in Rome in 1972.
Stefano Tatai represented Italy in nine Chess Olympiads: 1966 in Havana, 1970 in Siegen, 1972 in Skopje, 1974 in Nice, 1976 in Haifa, 1984 in Thessaloniki, 1986 in Dubai, 1988 in Thessaloniki, and 1992 in Manila, many times at board one. Best nominal Elo rating: 2495 in 1981.
As pointed out, Tatai was a record 12-times Italian chess champion: 1962 in Forte dei Marmi, 1965 in Florence, 1967 in Savona, 1970 in Sottomarina di Chioggia, 1974 and 1977 in Castelvecchio Pascoli, 1979 in Venice, 1983 in Arco, 1985, 1990 and 1991 in Chianciano Terme, and 1994-95 in Reggio Emilia.
<Mariotti e Tatai… i Coppi e Bartali degli scacchi>: http://soloscacchi.altervista.org/?...