Incomplete record. This archive holds 99 games of this event; the others are missing, and the number played is not established. Exact played total across eligible sections is unknown. Thirteen named Stevenson Memorial scores and four five-day major scores are published but absent from bounded 1964–1966 native pair/hash searches. The main event had 330 played games, with 71 preserved here. External PGN is for comparison only.
Result
The congress sections had independent fields, schedules and winners. This incomplete collection has no combined standings; the Stevenson Memorial result describes the main event.