Complex sentence: It was first run in 1979 as the Alycidon Stakes, named after the racehorse Alycidon, whose victories included the Goodwood Cup in 1949.
Split into simpler sentences: It was first run in 1979, and it was initially known as the Alycidon Stakes. This was in honour of the racehorse Alycidon, whose victories included the Goodwood Cup in 1949.