Complex sentence: He cut back his play over the next couple of years, but was selected again for Argentina at the Lugano 1968 Olympiad, earning a promotion to board three, where he scored well with 11.5/16.
Split into simpler sentences: He cut back his play over the next couple of years. He was selected again for Argentina at the Lugano 1968 Olympiad, earning a promotion to board three, where he scored well with 11.5/16.