Dutch Variation

With 1...f5 Black declares an intention to play a Dutch Defense against the Zukertort Opening, staking a claim to e4 before White has committed a central pawn. The choice of structure now rests with White. The most frequent reply, 2. d4, transposes directly into a main-line Dutch. The engine prefers 2. g3 and 2. c4, which keep the d-pawn flexible and let White decide later whether Black's setup is best met with a Leningrad-style or Stonewall-style fight, or with a different central arrangement altogether. The quieter 2. d3 prepares e4 to challenge the f5-pawn without giving material.

The main independent line is 2. e4, the Lisitsyn Gambit, in which White offers the e-pawn much as in the Staunton Gambit against the Dutch. The knight on f3 changes the positional picture, since it can jump to g5 and harass the light squares weakened by ...f5. White holds a slight edge by engine assessment and scores a little better than Black in online play, though Black does comparatively well against the gambit.