Anti-Moscow Gambit: 6.Bh4 dxc4 is variation 4 of 6 in the Semi-Slav Defence course, a advanced opening course for Black (ECO D43). It runs 26 moves and begins 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 …. White keeps the pin with 6.Bh4. Black takes on c4, and after 7.e4 kicks the bishop with ...g5. Black grabs space with ...b5 and gets an extra pawn, while White gets a lead in development. In the lesson every move is explained on a board and then drilled; it is free.
Move by move
1. d4 – White takes the centre.
1... d5 – Black claims the centre too.
2. c4 – White attacks d5 from the side.
2... c6 – Black supports d5 with the c-pawn.
3. Nf3 – White develops and covers e5.
3... Nf6 – Black develops and guards d5.
4. Nc3 – A third attacker against d5.
4... e6 – The Semi-Slav. The centre is rock solid.
5. Bg5 – The bishop pins the f6 knight.
5... h6 – Black asks the bishop at once.
6. Bh4 – The Anti-Moscow Gambit. White keeps the pin and offers the c4 pawn.
6... dxc4 – Black accepts. Now the b-pawn can hold the extra pawn.
7. e4 – White takes the whole centre and attacks with the pieces.
7... g5 – Black breaks the pin. The bishop has to leave h4.
8. Bg3 – The bishop goes back to g3, where it eyes e5 and the b8 corner.
8... b5 – Black guards the c4 pawn with the b-pawn and gains space.
The lesson goes on for 10 more moves, each with its explanation.
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