CREATE TABLE table_17818 ("Club" TEXT, "Played" TEXT, "Won" TEXT, "Drawn" TEXT, "Lost" TEXT, "Points for" TEXT, "Points against" TEXT, "Tries for" TEXT, "Tries against" TEXT, "Try bonus" TEXT, "Losing bonus" TEXT, "Points" TEXT)

HOW MANY PLAYERS PLAYED IN THE GAME THAT WON WITH 438 POINTS
SELECT "Played" FROM table_17818 WHERE "Points for" = '438'
SELECT "Played" FROM "table_17818" WHERE "Points for" = '438'