CREATE TABLE table_26734 ("Year" TEXT, "Championship" TEXT, "54 holes" TEXT, "Winning score" TEXT, "Margin" TEXT, "Runner ( s ) -up" TEXT)

In what tournament was the difference only 1 stroke and 54 holes with a 2 shot deficit?
SELECT "Championship" FROM table_26734 WHERE "Margin" = '1 stroke' AND "54 holes" = '2 shot deficit'
SELECT "Championship" FROM "table_26734" WHERE "54 holes" = '2 shot deficit' AND "Margin" = '1 stroke'