The Sicilian Defense: McDonnell Attack is a chess opening classified under ECO code B21 in the Semi-Open Games family, where Black responds to 1.e4 with something other than 1...e5, including the Sicilian Defense, Caro-Kann, and Pirc. It is reached after 2 moves: 1. e4 c5 2. f4. The resulting position leaves black to move.
Resulting Position
1. e4 c5 2. f4
rnbqkbnr/pp1ppppp/8/2p5/4PP2/8/PPPP2PP/RNBQKBNR b KQkq - 0 2Resulting Position