This move creates a reverse Sicilian but it's White's move and the aim for White to create an advantage leads generally to different positions. White's choices are now:

• 2. Nc3, the normal move
• 2. g3 many transposition possibilities
• 2. Nf3 can lead to a reversed Alekhine's Defence of sorts if Black replies with ...e4, with the option of cxd5 if Black tries to advance the d-pawn
• 2. d4 gives away any advantage

For explanation of theory tables, see theory table and for notation, see algebraic notation..

1.c4 e5

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Wikipedia has related information at English Opening

• Kasparov, Garry, & Keene, Raymond 1989 Batsford chess openings 2. ISBN 0-8050-3409-9.

• Taming Wild Chess Openings: How to Deal with the Good, the Bad and the Ugly over the Chess Board (2015). John Watson. ISBN 9056915703.