Alekhine Defense is a chess opening with the ECO code B03. It goes 1. e4 Nf6 2. e5 Nd5 3. d4 d6. White opens with 1. e4 (the king's pawn) and Black answers 1... Nf6. After 6 moves it is White to move. The lesson on the board explains every move of the line and lets you play it yourself; it is free.
The moves
1. e4 – White plays the pawn to e4
1... Nf6 – Black plays the knight to f6
2. e5 – White plays the pawn to e5
2... Nd5 – Black plays the knight to d5
3. d4 – White plays the pawn to d4
3... d6 – Black plays the pawn to d6
In chessGM's opening book this position continues with 4. c4, 4. Nf3.
About the Alekhine Defense
Black answers 1.e4 with 1...Nf6, inviting White's pawns to chase the knight. The idea is to make White over-extend, then attack the big centre.
After e5 Nd5 c4 Nb6 d4, White has a big centre that can become a target.
Black hits the centre with ...d6, ...Nc6, ...Bg4 and ...c5.
The quiet 4.Nf3 (Modern) is White's safest way to keep a small edge.
chessGM