Russian System: Hungarian 7...a6 is variation 3 of 6 in the Grünfeld Defence course, a advanced opening course for Black (ECO D97). It runs 22 moves and begins 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 …. White grabs c4 with the queen and builds the centre with e4. Black plays ...a6 and ...b5 to gain time against the queen, then ...c5 and ...Bb7 to attack the centre from the side. In the lesson every move is explained on a board and then drilled; it is free.
Move by move
1. d4 – White occupies the centre.
1... Nf6 – Develops and controls e4.
2. c4 – Gains space.
2... g6 – Prepares ...Bg7.
3. Nc3 – Develops and prepares e4.
3... d5 – The Grünfeld.
4. Nf3 – Develops before deciding on the centre.
4... Bg7 – Completes the fianchetto.
5. Qb3 – The Russian System: pressure on d5 and the plan of Qxc4 followed by e4.
5... dxc4 – Gives up the centre, but the queen will be a target once it takes on c4.
6. Qxc4 – Regains the pawn and prepares e4.
6... O-O – Castles before White's centre advances.
7. e4 – Builds the full centre.
7... a6 – The Hungarian: prepares ...b5, gaining time on the queen and space on the queenside.
8. Be2 – Calm development so White can castle.
8... b5 – Kicks the queen and grabs space.
The lesson goes on for 6 more moves, each with its explanation.
chessGM