Sound advice from above posters. KID takes some study to master, but is theoretically sound against d4. The Dutch is also not terribly difficult and lets you feel more in control.
Black's 1... f5 stakes a serious claim to the e4 square and looks towards an attack on White's kingside in the middlegame. However, it weakens Black's own kingside somewhat, and does nothing to contribute to Black's development. As of 2006[update], the Dutch is unpopular in top-level play. It has never been one of the main lines against 1.d4, though in the past a number of top players, including Alexander Alekhine, Bent Larsen, Paul Morphy and Miguel Najdorf, have used it with success. Perhaps its high-water mark occurred in 1951, when both world champion Mikhail Botvinnik and his challenger, David Bronstein, played it in their championship match.
White most often fianchettoes his king's bishop with g3 and Bg2. Black also sometimes fianchettoes his king's bishop with ...g6 and ...Bg7 (the Leningrad Dutch), but may instead develop his bishop to Be7, d6 (after . . .d5), or b4 (the latter is most often seen if white plays c4 before castling). Play often runs 2.g3 Nf6 3.Bg2 e6 4.Nf3 (4.Nh3!? is also possible, intending Nf4-d3 to control the e5 square if Black plays the Stonewall Variation) Be7 5.0-0 0-0 6.c4 and now Black chooses between 6...d5 (the characteristic move of the Stonewall Variation), 6...d6, the Iljin-Zhenevsky System or Fluid System (less popular today), or Alekhine's move 6. . .Ne4!? retaining the option of moving the d-pawn either one or two squares.