In January 1991 , Polgar became the third woman to earn the Grandmaster title . Much is made , by her supporters , of the fact that Polgar had got the three GM norms and a rating over 2500 . In January 1991 , Polgar became the first woman to earn the Grandmaster title in the conventional way â `` that is , by achieving three GM norms and a rating over 2500 .