Chess Opening Theory/1. e4/1...c5/2. Nf3/2...Nc6/3. d4/3...cxd4/4. Nxd4/4...e5

= SUi Mama Löwenthal Variation = The logic behind the move e5 is that Black, instead of delaying e5, hopes to resolve the issue of pawn structure early on. White has to move the d4 Knight; the test to Black's plan is the Nb5 line, putting pressure on the d6 square.

Theory table
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5