Amazon Attack: Siberian Attack is a chess opening with the ECO code A45, part of the Amazon Attack family. It goes 1. d4 Nf6 2. Nc3 d5 3. Qd3. White opens with 1. d4 (the queen's pawn) and Black answers 1... Nf6. After 5 moves it is Black to move. The lesson on the board explains every move of the line and lets you play it yourself; it is free.