Polish Opening: Bugayev Attack
The Bugayev Attack is 1.b4 e5 2.a3, propping up the b4 pawn with the a-pawn before developing the bishop. White wants Bb2 and pressure on e5, while Black builds a broad center with ...d5 and uses ...a5 or ...e4 to gain space.
- Moves
- 1.b4 e5 2.a3
- ECO
- A00
- Engine
- −0.39 · a slight edge for Black (Stockfish 17.1, depth 20)
- Played
- 719 games in our lichess sample
- White scores
- 55.0%
Key ideas for both sides
White
- Play Bb2 next to hit e5 along the long diagonal, as in all three engine lines.
- Add e3 and c4 to fight for d5, and consider c5 to gain queenside space.
- Because a3 already protects b4, ...a5 can be met calmly with b5 instead of a trade.
- Develop the king's bishop to e2 and the knight to f3 only after the center is settled.
Black
- Take the center with 2...d5, the engine's top choice, and back e5 with ...Nd7 and ...Ngf6.
- Strike at b4 with ...a5 to open the a-file and make the a3 pawn a target.
- The push ...e4 gains space and blunts White's b2 bishop once ...d5 supports it.
- Develop the f8 bishop to d6 or e7 behind the pawns rather than chasing b4.
Plans and pawn structure
White spent a tempo on a3, so Black gets a free hand in the center. Black builds with ...d5, ...Nd7 and ...Ngf6, keeping e5 solid against the b2 bishop, and can push ...e4 to gain more space. White aims for e3, c4 and sometimes c5, playing on the queenside where the b4 and a3 pawns help. The fight often turns on whether Black's center becomes a strength or a target for c4 and d3.
What the engine plays from here
Stockfish 17.1 at depth 20 rates the position −0.39: a slight edge for Black. Its three top choices for Black:
- −0.39 2...d5 3.Bb2 Nd7 4.e3 Ngf6 5.c4
- −0.12 2...a5 3.Bb2 e4 4.b5 d5 5.e3
- −0.08 2...Nf6 3.Bb2 d6 4.e3 a5 5.Be2
Pawns, from White's side.
How it scores on lichess
719 rated lichess games reached this position; White scored 55.0%.
Light: White wins. Grey: draws. Dark: Black wins. About the sample.
How to play against it
As Black, play 2...d5 and develop behind your pawns with ...Nd7, ...Ngf6 and ...Bd6. Use ...a5 to question the b4 pawn. Avoid overextending with ...e4 before your pieces are ready, because d3 can then hit the pawn chain. White's slow a3 is your reason to grab space now.
Questions
What are the moves of the Polish Opening: Bugayev Attack?
The Polish Opening: Bugayev Attack starts 1.b4 e5 2.a3. Its ECO code is A00.
Is the Polish Opening: Bugayev Attack good for White?
Stockfish 17.1 rates the position −0.39 at depth 20, which is a slight edge for Black. In 719 lichess games from our sample, White scored 55.0%. A slow but sound way to keep the Polish Opening going, though it gives Black a comfortable center, so White needs patience on the queenside.
What is the main idea of the Polish Opening: Bugayev Attack?
White secures b4 with a3 and then puts the bishop on b2 to pressure e5. Black uses the extra time for a big center with ...d5 and ...Nd7, with ...a5 and ...e4 as space-gaining tools.
What should Black play next?
The engine's first choice is d5, with a5 and Nf6 close behind. 2...d5 grabs the center while White's a3 is a slow move, and ...Nd7 will support e5.
Related lines
Updated October 2026. Sources and method.