The Spanish Exchange Variation is reached after the moves 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bc6 dc 5. 00, creating the following position.
It's notoriously difficult for Black to get any counterplay against White's minute advantage.
This month's New in Chess
had a nice Fischer story featuring this opening. As is well known, Wilhelm Steinitz became delusional towards the end of his life and was heard to boast that he could offer God odds of pawn and move.
"That would never work," said the comparatively rational Fischer. Then he thought a bit more and added, "But if I was White against God, at least I could play the Spanish Exchange and get a draw!"
"Suppose God played the Sicilian instead?" asked Hans Ree, a Dutch contemporary.
"No problem!" replied the great Bobby. "I'd play the Sozin Variation and stand better!"