Scotch Game: Haxo Gambit: what should White play?

In the Scotch Game: Haxo Gambit, White's most incisive continuation is e5, striking directly at the black queen on f6 and gaining space in the center. With an engine evaluation of +0.81, this thrust outperforms the more common quiet continuations. Black must immediately address the attacked piece, giving White tempo to complete development and fight for the initiative.

The case for advancing e5

Although e5 is selected in 16.0% of recorded games (41K recorded), it provides White with a 52.4% scoring rate and the strongest engine assessment. By advancing the pawn, White forces the black queen to relocate while opening dynamic possibilities for the white minor pieces. An illustrative continuation demonstrating the tension in the center runs e5 Qg6 cxd4 d5 Bd3 Bb4+, where both sides actively contest space and piece activity.

Wing alternatives: b4 and a4

White also possesses sharp flanking options such as b4, chosen in 1.6% of games (4.1K recorded), which scores 47.6% and evaluates at +0.76. A sample continuation follows b4 Bb6 e5 Nxe5 Qe2 d5. Alternatively, a4 holds an evaluation of +0.26, illustrated by a4 Ne5 Nxe5 Qxe5 O-O dxc3, creating space on the queenside before resolving the central tension.

Classical development: Castling and Bg5

The most frequent choices in practice opt for straightforward development rather than immediate confrontation. Castling via O-O appears in 53.5% of games (138K recorded) with an evaluation of -0.05 and a 53.1% score, seen in O-O d6 a4 dxc3 Nxc3 Nge7. Meanwhile, Bg5 occurs in 28.9% of games (75K recorded), scoring 51.9% with an evaluation of -0.13 through the continuation Bg5 Qg6 O-O d6 b4 Bb6. While playable, these moves concede the advantage that e5 commands.