Final answer:
To earn the title of International Grandmaster in chess, a player must reach a rating of 2500 and also achieve two or three norm results in international tournaments.
Step-by-step explanation:
The minimum rating points a player must attain to earn the title of an International Grandmaster in chess is 2500. Achieving this rating level is one of the criteria set by the World Chess Federation (FIDE) for the title. In addition to reaching a rating of 2500 at any point in a chess career, players must also achieve two or three norm results in international tournaments — essentially, strong performances that prove their capability at high levels of competitive play.