In the following year Oh So Sharp won the 1000 Guineas in record time and then took the Oaks by six lengths before being narrowly beaten in her next two starts in major weight-for-age races.

Oh So Sharp, described by Timeform as "a big, lengthy filly and a grand mover with a raking stride"[2] was bred in Ireland by her owner Sheikh Mohammed.

Ridden on this occasion by the stable jockey Lester Piggott, who had been very keen to return from injury to ride her, she took the lead approaching the final furlong and drew clear to win by two lengths at odds of 6/4.

In the International Classification produced by the official handicappers of France, Ireland and the United Kingdom, Oh So Sharp was given a rating of 77, five pounds behind the year's highest-rated two-year-old filly Triptych.

In the closing stages however Cauthen produced the favourite with a powerful late run and she caught the leaders in the last stride to win a three-way photo finish by two short heads from Al Bahathri and Bella Colora.

The runner-up, owned by Sheikh Mohammed's older brother Hamdan Al-Maktoum went on to win the Irish 1000 Guineas and the Coronation Stakes while Bella Colora won the Prix de l'Opéra in autumn.

She started 4/5 favourites in a field of twelve, with her main rivals in the betting being Rainbow Quest, Strawberry Road, Petoski, and the Irish Derby winner Law Society.

Oh So Sharp took the lead early in the straight and got the better of a prolonged struggle with the four-year-old Rainbow Quest but was caught in the closing stages and beaten a neck by Petoski.

Piggott set an unexpectedly slow pace on Commanche Run before accelerating early in the straight catching Cauthen unawares.Oh So Sharp chased the leader throughout the closing stages but never drew level and finished second, beaten three quarters of a length.

[11] She started the 8/11 favourite with her closest rival in the betting being her stable companion Lanfranco, winner of the William Hill Futurity and the King Edward VII Stakes.

Oh So Sharp moved past Lanfranco in the straight but was unable to draw away from the colt and quickly came under renewed pressure from her stable companion and from the outsider Phardante.

None of her progeny have been as successful on the track as she was, but she has produced winners in Rosefinch, who won the Prix Saint-Alary, Shaima (USA) (1988, by Shareef Dancer) (Long Island Handicap), Sacho (IRE) (1993, by Sadler's Wells) and Felitza.