Grünfeld Defense: Three Knights Variation, Vienna Variation
Grünfeld Defense: Three Knights Variation, Vienna Variation is a chess opening with the ECO code D95, part of the Grünfeld Defense family. It goes 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Qb3. White opens with 1. d4 (the queen's pawn) and Black answers 1... Nf6. After 11 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.
The moves
1. d4 – White plays the pawn to d4
1... Nf6 – Black plays the knight to f6
2. c4 – White plays the pawn to c4
2... g6 – Black plays the pawn to g6
3. Nc3 – White plays the knight to c3
3... d5 – Black plays the pawn to d5
4. Nf3 – White plays the knight to f3
4... Bg7 – Black plays the bishop to g7
5. e3 – White plays the pawn to e3
5... O-O – Black castles kingside
6. Qb3 – White plays the queen to b3
About the Grünfeld Defense
Black plays ...Nf6, ...g6 and ...d5, letting White build a big pawn centre and then attacking it with pieces. It is sharp and full of theory.
After cxd5 Nxd5 e4, Black trades on c3 and hits d4 with ...c5.
The bishop on g7 is Black's best piece, pressing on d4 along the long diagonal.
Black adds ...Nc6, ...Bg4 and ...Qa5 to attack the centre; White tries to push d5.
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