[4] Vaitonis may have been the first player to use what is now called the Benko Gambit (1.d4 Nf6 2.c4 c5 3.d5 b5), in its most common move order, in a game against Einar Thorvaldsson at the 1936 Munich non-FIDE Olympiad.

[6] In July 1943, he took 4th place, behind Birmanas, Romanas Arlauskas, and Leonardas Abramavičius, at the 12th Lithuanian Championship in Vilnius.

In 1944-45, he joined the exodus of many other Baltic players - such as Arlauskas, Dreibergs, Endzelins, Jursevskis, Mednis, Ozols, Sarapu, Tautvaišas, Zemgalis - to the West.

[11] Vaitonis played for Canada in two Olympiads:[3] He was awarded the International Master title in 1952.

[12] In the 1960s, he continued to participate in Canadian championships and on teams (Lithuanian Chess Club, McMaster University).