Dutch Defense: Blackmar's Second Gambit is a chess opening with the ECO code A82, part of the Dutch Defense family. It goes 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. f3. White opens with 1. d4 (the queen's pawn) and Black answers 1... f5. After 7 moves it is Black to move. After the last move Black is a pawn ahead in material. The lesson on the board explains every move of the line and lets you play it yourself; it is free.
The moves
1. d4 – White plays the pawn to d4
1... f5 – Black plays the pawn to f5
2. e4 – White plays the pawn to e4
2... fxe4 – Black captures on e4 with the f-pawn
3. Nc3 – White plays the knight to c3
3... Nf6 – Black plays the knight to f6
4. f3 – White plays the pawn to f3
About the Dutch Defense
Black answers 1.d4 with 1...f5, grabbing the e4 square. It is ambitious and aims for a kingside attack, but it weakens Black's king a little.
Black controls e4 with ...f5, ...Nf6 and sometimes ...d5 (Stonewall).
A common attacking plan is ...Qe8 to h5 with pieces moving to the kingside.
Beware the e8-h5 diagonal; early Qh5+ or Bg5 tricks can hurt.
chessGM