Chess Opening Theory/1. e4/1...c5/2. Nf3/2...d6/3. d4/3...cxd4/4. Nxd4/4...Nf6/5. Nc3/5...e6

=Scheveningen Variation= 5... e6, building a so-called "small center", is the signature move of the Scheveningen Variation of the Sicilian Defence. 5... e6 strengthens Black's control of the important d5 square and opens e7 for the development of his dark-squared bishop. If Black is able to safely play ... d5 later on, he will have a good position.

In contrast to the Najdorf Variation, 5... a6, the Scheveningen commits Black earlier to a certain pawn structure in the center and delays queenside operations, but does more to promote Black's early development and castling. Both systems are considered very solid choices for Black, however 5... a6 has been played by even the best Scheveningen specialists (including Garry Kasparov) to avoid the dangerous Keres Attack, '''5... e6 6. g4!''' (Although by no means winning for White, statistics sharply favour the white pieces.)

Theory table
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'''1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6'''