Sicilian Defense: Smith-Morra Gambit, Danish Variation

A sharp and aggressive chess opening that sacrifices a pawn for rapid development and attacking chances.

The opening is characterized by an early pawn sacrifice by White to gain a lead in development and create an imbalance in the position. White offers a pawn on c3, which Black can capture, but in doing so, Black allows White to quickly develop their pieces and create threats. The Danish Variation specifically refers to the move order where White plays Nf3 after Black captures on c3.

This opening is popular among club players and can lead to exciting and tactical games. However, it is not as popular at the highest level, as it is considered somewhat risky for White to give up a pawn so early in the game. Nevertheless, it can catch an unprepared opponent off guard and lead to a quick victory for White if Black is not careful.

The main idea for White is to quickly develop their pieces, especially the bishops and knights, and to put pressure on Black's center and kingside. Black, on the other hand, should try to consolidate their extra pawn and neutralize White's attacking chances.

There are several ways for Black to respond to the gambit, including accepting the pawn, declining it, or even counter-gambiting. Each of these options can lead to different types of positions and require a good understanding of the resulting pawn structures and piece play.

Overall, the opening is an exciting and aggressive choice for players who enjoy sharp tactical battles and are willing to take risks for the initiative.