Can you tell me the total number of Prev that has the Chng of +10, and the Rating larger than 2765?
CREATE TABLE "fide_january_2008_top_ten" (
  "rank" real,
  "prev" real,
  "player" text,
  "rating" real,
  "chng" text
);
SELECT COUNT("prev") FROM "fide_january_2008_top_ten" WHERE "chng"='+10' AND "rating">2765;