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The Sokolsky Opening, also known as the Orangutan and the Polish Opening, is an uncommon chess opening that begins with the move: . 1. b4. According to various databases, out of the twenty possible first moves from White, the move 1.b4 ranks ninth in popularity. [1]
An alternative approach for White is 3.Bc4, delaying d2–d4, or forgoing it entirely, playing d2–d3 instead. The move 3.Bc4 is also White's route to a possible Légal Trap. Some continuations: 3...Nc6 transposes to the Semi-Italian Opening. [36] 3...f5 is the López Countergambit: [37] 4.d4 transposes to the Philidor Countergambit. [38]
The Modern Benoni is a chess opening that begins with the moves 1.d4 Nf6 2.c4 c5 3.d5 e6.It is classified under the ECO codes A60–A79. After the initial moves, Black proceeds to capture on d5, creating a majority of black pawns on the queenside.
The Benko Gambit, also known as the Volga Gambit, begins 1.d4 Nf6 2.c4 c5 3.d5 b5. Play usually continues 4.cxb5 a6 5.bxa6 Bxa6. Black sacrifices a pawn for open lines and long-term positional pressure on the queen's side.
The major lines in the opening start with 1.e4 a6 2.d4 b5 and then branch. The main line continues 3.Nf3 Bb7 4.Bd3 e6 5.0-0 Nf6. Another important line is the Three Pawns Attack, sometimes called the St. George Gambit, which continues 3.c4 e6!? 4.cxb5 axb5 5.Bxb5 Bb7 (Black can also play 3...Bb7 and offer the b-pawn for the more valuable White e-pawn).
The Modern Defense (also known as the Robatsch Defence after Karl Robatsch) is a hypermodern chess opening in which Black allows White to occupy the center with pawns on d4 and e4, then proceeds to attack and undermine this "ideal" center without attempting to occupy it. The Modern Defense usually starts with the opening moves: 1. e4 g6
It was not until early 2008 that an answer to Black was finally found. After 9.0-0 b4, White has the positional sacrifice 10.Nd5!, which gives Black long-term weaknesses and an open e-file for White to play on. Since then, it has been popular on all levels of play.
After playing the four moves outlined above White will usually choose to direct play into another opening system [2] such as the Réti Opening (by playing c4), the King's Indian Attack (by playing d3, Nbd2 and e4), the Catalan (by playing d4 and c4), or the Hippopotamus (by playing b3 and Bb2). The Barcza System is thus essentially a ...