4.Ng5 main line: 10.f4 is variation 2 of 6 in the Two Knights Defence course, a beginner opening course for Black (ECO C59). It runs 24 moves and begins 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 …. White supports the e5 knight with the f-pawn. Black takes en passant, opens the f-file and castles. White's king is still in the middle, and Black has strong play for the pawn. In the lesson every move is explained on a board and then drilled; it is free.
Move by move
1. e4 – White takes the centre.
1... e5 – Black claims an equal share.
2. Nf3 – White develops and attacks e5.
2... Nc6 – Black defends e5.
3. Bc4 – The bishop aims at f7.
3... Nf6 – The Two Knights Defence: Black attacks e4.
4. Ng5 – Two white pieces attack f7.
4... d5 – Black blocks the bishop.
5. exd5 – White takes the pawn.
5... Na5 – Black attacks the c4 bishop.
6. Bb5+ – The bishop escapes with check.
6... c6 – Black blocks the check and hits the bishop.
7. dxc6 – White takes the pawn.
7... bxc6 – Black takes back.
8. Be2 – The bishop goes back to safety.
8... h6 – Black chases the knight.
The lesson goes on for 8 more moves, each with its explanation.
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