1955 interzonal? That was Gotheburg, but it doesn't fit?
That was when the Argentinians accused the Soviets of cheating?
The spelling is the issue here, some publications use Goteborg. Yes, the games were played in the round where three Soviet players played the same line against three Argentinian players. Incredibly, there is very little on the "Goteborg Triplets" on the web.
1955 interzonal? That was Gotheburg, but it doesn't fit?
That was when the Argentinians accused the Soviets of cheating?