The aim of 2…c5 is to play in the Sicilian style against the Bishop’s Opening. However, it creates structural issues in the Black position, unnecessarily weakening the pawn structure too early in d6 since e5 has already been played. White development goes smoothly.

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1. e4 e5 2. Bc4 c5?!

Wikipedia has related information at Bishop's Opening.

Bibliography

• Kasparov, Gary & Keene, Raymond (1989, 1994). Batsford Chess Openings 2. ISBN 0-8050-3409-9.
• Lane, Gary (1993). Winning With the Bishop's Opening. ISBN 0-7134-7113-1.

External links =

See also the Wikibooks Chess Opening Theory and Chess Opening Theory/1. e4/1...e5/2. Bc4.

• Goeller, Michael (2012). 21st Kenilworth CC Championship 2012, Round 1 Michael Goeller - Daniel Komunicky [C23]. Kenilworth Chess Club
• Goeller, Michael. The Bishop's Opening.
• Harding, Tim (August 1998). The Kibitzer: What Exactly is the Bishop's Opening?. ChessCafe.com.
• Harding, Tim (September 1998). The Kibitzer: The Eternal Appeal Of The Urusov Gambit. ChessCafe.com.
• Harding, Tim (October 1998). The Kibitzer: Is the Urusov Gambit Sound?. ChessCafe.com