CREATE TABLE table_204_651 (id DECIMAL, "date" TEXT, "championship" TEXT, "location" TEXT, "category" TEXT, "surface" TEXT, "prev. result" TEXT, "prev. points" DECIMAL, "new points" DECIMAL, "outcome" TEXT)

what number of championships had hard surfaces ?
SELECT COUNT("championship") FROM table_204_651 WHERE "surface" = 'hard'
SELECT COUNT("championship") FROM "table_204_651" WHERE "surface" = 'hard'