Bird Opening: what should White play?

In the Bird Opening position after Black plays 1...b6, White's most critical options are developing the kingside or seizing the center. The engine's top recommendation is e4, which claims central space immediately and holds an evaluation of +0.05 across 257K recorded games with a 52.8% scoring rate for White. Alternatively, Nf3 represents the overwhelming human preference, appearing in 72.4% of recorded games (1.22M recorded) and leading to sound positional setups.

Seizing the Center with 2. e4

Playing e4 immediately transforms the game, using the flank thrust of the f4 to support an aggressive central presence. Although chosen in only 15.2% of database games, it yields the highest engine evaluation (+0.05) among White's candidate moves. An illustrative engine continuation runs e4 Bb7 Nc3 e6 d4 Bb4, where White establishes a broad pawn center while Black challenges the structure with flank pressure against the e4 pawn and the knight on c3.

The Classical Approach with 2. Nf3

The vast majority of players opt for the standard Bird continuation Nf3, which secures the e5 outpost and guards against potential checks along the h4-e1 diagonal. White scores 52.5% from this position, carrying an engine evaluation of -0.13. The main illustrative sequence continues Nf3 Bb7 e3 c5 b3 g6, entering a double-fianchetto battle where both sides contest control over the central light squares.

Minor Alternatives

White may also choose quiet development with e3, recorded in 9.9% of games (168K recorded) with an evaluation of -0.18 and a 51.3% score, often leading to e3 Bb7 Nf3 Nf6 g3 g6. Flank development via b3 appears in 1.6% of games (27K recorded), yielding White 53.3% points scored alongside an evaluation of -0.18 via b3 Bb7 Bb2 Nf6 e3 g6. The least common top-five choice, Nc3, is chosen in 0.9% of recorded games (16K recorded) with an evaluation of -0.24 and an even 50.0% score following Nc3 d5 g3 e6 Bg2 Bb7.