Chess Opening Theory/1. Nf3/1...f5

= Dutch Defence =

1...f5
Black's opening move aims to transpose into a Dutch Defence. 2.d4 gives a main-line Dutch, while 2.c4 and 2.g3 reserve options.

A major independent option is 2.e4. The sacrifice of White's e-pawn is borrowed from the Staunton Gambit, but the positional themes are very different since here White's king's knight can reach g5.

2.d3 is a way of preparing e4.

Theory table

 * 2.d4
 * 2.c4
 * 2.g3
 * 2.e4