Sokolsky Opening

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This article uses algebraic notation to describe chess moves.
Sokolsky Opening
Image:chess zhor 26.png
Image:chess zver 26.png a8 rd b8 nd c8 bd d8 qd e8 kd f8 bd g8 nd h8 rd Image:chess zver 26.png
a7 pd b7 pd c7 pd d7 pd e7 pd f7 pd g7 pd h7 pd
a6 b6 c6 d6 e6 f6 g6 h6
a5 b5 c5 d5 e5 f5 g5 h5
a4 b4 pl c4 d4 e4 f4 g4 h4
a3 b3 c3 d3 e3 f3 g3 h3
a2 pl b2 c2 pl d2 pl e2 pl f2 pl g2 pl h2 pl
a1 rl b1 nl c1 bl d1 ql e1 kl f1 bl g1 nl h1 rl
Image:chess zhor 26.png
Moves 1. b4
ECO A00
Parent Flank opening
Synonym(s) Orangutan or Polish Opening
Chessgames.com opening explorer

The Sokolsky Opening (also known as the Orangutan or Polish Opening) is an uncommon chess opening:

1. b4

According to ChessBase, in master level chess, out of the twenty possible first moves from White, 1.b4 ranks ninth in popularity. It is considered an irregular opening, so it is classified under the A00 code in the Encyclopaedia of Chess Openings.

The opening has never been popular at the top level, though a number of prominent players have employed it on occasion (for example, Richard Réti against Abraham Speijer in Scheveningen 1923 and Boris Spassky against Vasily Smyslov in the 1960 MoscowLeningrad match). Perhaps its most famous use came in the game TartakowerMaroczy, New York 1924.[1] The name "Orangutan Opening" originates from that game: the players had visited the zoo the previous day, and Tartakower had consulted an orangutan there about what move he should open with the next day. Soviet player Alexei Pavlovich Sokolsky (1908–1969) wrote a monograph on this opening in 1963, Debyut 1 b2-b4.

The opening is largely based upon tactics on the queenside or the f6 and g7 squares. Black can respond in a variety of ways: perhaps the most principled is to make a claim to the centre (which White's first move ignores) with 1...d5 (possibly followed by 2.Bb2 Qd6, attacking b4 and supporting e7-e5,[2], 1...e5 or 1...f5, though less ambitious moves like 1...Nf6, 1...c6 (called the Outflank Variation, preparing ...Qb6 or ...a5), and 1...e6 are also reasonable. Rarer attempts have been made with 1...a5 or 1...c5. 1...e6 is usually followed by ...d5, ...Nf6 and an eventual ...c5. After 1.b4 e5 it is normal for White to ignore the attack on the b-pawn and play 2.Bb2, when 2...d6, 2...f6, and 2...Bxb4 are all playable. After 1...a5 White will most likely play 2.b5 and take advantage of Black's queenside weakness. 1...c5 is much sharper and more aggressive and is normally used to avoid theory. After the capture Black will generally place pressure on the c5 square and will develop an attack against White's weak queenside structure.

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