Home › Openings › Bishop's Opening › Bishop's Opening: McDonnell Gambit Bishop's Opening: McDonnell Gambit, McDonnell Double Gambit ECO C23 · 1. e4 e5 2. Bc4 Bc5 3. b4 Bxb4 4. f4 Related variationsBishop's Opening: McDonnell Gambit, La Bourdonnais-Denker Gambit Practice this opening · Play against the computer