411 REFERENCE · Wikibooks
Chess Opening Theory/1. d4/1...e5/2. Nf3/2...e4
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
2... e4 - Reversed Krebs
Of course black pushes further, forcing white to lose tempo and move the knight. White has a few responses to this:
White's responses:
Nfd2 - 61%; winrate 48% (w) - 49% (b)
Ne5 - 16%; winrate 45% - 53% - Reversed Mokele Mbembe
Ng1 - 16%; winrate 49% - 48% - Reversed Brooklyn