ECO A00
Polish Opening
Also known as: Sokolsky Opening, Orangutan
The Polish Opening begins with the flank thrust 1.b4, staking an immediate claim on the queenside and preparing to fianchetto the dark-squared bishop to b2. From b2 the bishop rakes the long a1-h8 diagonal and, above all, presses on the e5-square. The critical reply is 1...e5, when after 2.Bb2 Bxb4 3.Bxe5 Nf6 White recovers the pawn and reaches an offbeat but perfectly playable middlegame. Sidestepping mainstream theory, the opening rewards general understanding over memorized lines and has long served as a provocative surprise weapon.
1. b4 e5 2. Bb2 Bxb4 3. Bxe5 Nf6
Strategic ideas
The Polish stakes an early claim on the queenside with 1.b4, gaining space and preparing the fianchetto Bb2, where the bishop eyes the long a1-h8 diagonal and the e5-square. White is content to develop unconventionally, steering the game into positions where general understanding matters more than concrete theory. The advanced b-pawn can cramp Black's queenside and support later expansion with a4 and b5, giving White a distinctive spatial plan on that wing.
The trade-off is that 1.b4 does nothing for the center and can itself become a target. After the principled 1...e5 2.Bb2 Bxb4 3.Bxe5 material is restored, but the b2-bishop has been diverted to e5, where it will eventually be harassed by Black's developing pieces. White then aims for harmonious development with Nf3, e3 and c4, while finding a safe retreat for the active bishop; Black, in turn, hopes that White's neglected center offers targets for counterplay.
Main variations
The most direct test is 1...e5, meeting the flank move with central occupation. After 2.Bb2 Bxb4 3.Bxe5 Nf6 Black develops smoothly and pressures the exposed e5-bishop, while White completes development with Nf3 and e3. A common alternative is 1...d5, when 2.Bb2 confronts the center head-on and play often continues with e3, Nf3 and a well-timed c4 or a3 to preserve the queenside pawn.
Black has several other reasonable setups. The flexible 1...Nf6 develops naturally and avoids the immediate pawn grab, while 1...c6 prepares to challenge the b4-pawn with ...a5 or to support a central advance. In each case White leans on the b2-bishop and the extra queenside space, trying to reach a comfortable, maneuvering middlegame away from heavily analyzed main lines.
History and background
The opening carries several names reflecting its colorful past. Savielly Tartakower unveiled 1.b4 at the great New York 1924 tournament and dubbed it the "Orangutan," reportedly after a visit to the Bronx Zoo the day before his game. The Soviet master Alexey Sokolsky later devoted serious analysis to the line, and it is frequently called the Sokolsky Opening in his honor. The "Polish" label reflects Tartakower's long association with Poland. Though seldom seen at the elite level, it endures as a respected surprise weapon prized for its independence from mainstream theory.
Key ideas
- Open with 1.b4 to seize queenside space and fianchetto the bishop to b2.
- The b2-bishop targets e5 and the long a1-h8 diagonal.
- After 1...e5 2.Bb2 Bxb4 3.Bxe5 White regains the sacrificed pawn.
- The opening sidesteps mainstream theory in favor of understanding.
- Tartakower nicknamed it the "Orangutan" at New York 1924.
- Alexey Sokolsky's analysis gave the line its Sokolsky Opening name.
Typical plans
White
- Fianchetto the bishop to b2 and press the long a1-h8 diagonal.
- Regain the pawn with Bxe5 after the ...e5 and ...Bxb4 exchanges.
- Complete development quickly with Nf3, e3 and c4.
- Expand on the queenside with a4 and b5 to gain space.
- Steer the game into offbeat positions that reward understanding.
Black
- Challenge the center directly with 1...e5 or 1...d5.
- Grab the b4-pawn with ...Bxb4 to disrupt White's setup.
- Develop naturally and exploit White's neglected center.
- Harass the active e5-bishop to gain time for development.
- Aim for a solid structure and comfortable equality.