Chess Opening Theory/1. e4/1...e6/2. d4/2...d5/3. e5/3...c5/4. c3/4...Nc6/5. Nf3/5...Qb6/6. Bd3/6...cxd4/7. cxd4

7.cxd4
This is an obvious recapture and it also sets a devious trap! If black continues 7... Nxd4? 8. Nxd4 Qxd4??, 9. Bb5+ wins the queen.