Chess Opening Theory/1. e4/1...e6/2. d4/2...d5/3. e5/3...c5/4. c3/4...Nc6

=French Defence: Advance Variation=

Here White usually decides to overprotect their center-pawns by playing 5.Nf3. In a few games, and for the same purpose, White players have also tried 5.Be3 and 5.f4.

Theory table
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1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6