The Dutch Defense in chess is defined by movements 1.d4 f5 and its simplest variant, the Stonewall system, can be used by beginners to respond to queen's pawn opening 1.d4. Actually the Stonewall system can be used against any chess opening other than 1.e4 and it is also an easy to learn system that does not require memorizing plays as with other openings or defenses.
The Stonewall system (ECO A93-A95) consists of placing the black pawns in c6, d5, e6 and f5 after moving the black knight to f6 (Kf6). This structure is very solid against any play of the white pieces and the system serves as a universal defense for black against any white opening other than 1.e4. There are multiple options of attack with black pieces, an example would be to take the black bishop to d6 (Bd6) and the knight before e4 (Ne4), the rook we would try to pass in 2 movements to h6, to aim with black rook and black bishop the pawn h2 white after the short castling of white.
The black pieces can respond on her first play with e6 instead of f5 to end up playing this same Stonewall system, so we can enter in a way with more possibilities (1.d4 e6 2 ... f5) since with 1.d4 e6 as the first movement we give less clues to our rival, since we could enter in addition to the Dutch Defense in the French Defense.
Another variant of the Dutch Defense totally different and independent of the Stonewall system, is the Leningrad variation (ECO A87-A89) that is more difficult than the previous one but very aggressive, in which black pieces develops her f8 bishop by fianchetto, by example 1.d4 f5 2.Nf3 Nf6 3.g3 g6 4.Bg2 Bg7 5.O-O O-O 6.c4 d6 and where they play from the start to win.
Finally, we also include chess games in PGN format of the Classic variation of the Dutch Defense, since although those who decide on the Stonewall system do not need to know the Leningrad variation and on the contrary, in both cases, if it is necessary to know the Classic variations ( ECO A96).
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