East Pediment of the Temple of Zeus at Olympia
Drawing. A.F.Stewart, Greek Sculpture,fig.262
This shows the contest of Pelops with Oinomaos, King of Pisa, for the hand of his daughter Hippodameia. An oracle is said to have told the King that his son-in-law would murder him, so he challenged each suitor to a chariot race-to-the-death, from Olympia to Corinth. Since Oinomaos' horses were divine the outcome was a foregone conclusion and the loser was killed - all except Pelops who succeeded either by cheating or by the gift of swifter horses from Poseidon.