CREATE TABLE table_20764 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Ground" TEXT, "Crowd" FLOAT, "Date" TEXT)

What are the home team scores when richmond is the home team?
SELECT "Home team score" FROM table_20764 WHERE "Home team" = 'Richmond'
SELECT "Home team score" FROM "table_20764" WHERE "Home team" = 'Richmond'