4...Bb4+ 5.c3 dxc3 6.bxc3 is variation 5 of 6 in the Scotch Gambit course, a intermediate opening course for White (ECO C44). It runs 22 moves and begins 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bb4+ …. Black checks with the bishop. White blocks with the c-pawn and takes back on c3 with the b-pawn. The bishop must move again. White castles and gets fast development 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. d4 – White opens the centre.
3... exd4 – Black takes.
4. Bc4 – The Scotch Gambit. The bishop aims at f7.
4... Bb4+ – Black checks with the bishop.
5. c3 – White blocks with the pawn and offers it.
5... dxc3 – Black takes the pawn.
6. bxc3 – White takes back with the b-pawn and attacks the bishop.
6... Ba5 – The best retreat. The bishop keeps watching c3.
7. O-O – White castles first. The king is safe and the rook gets ready.
7... Nf6 – Black develops and attacks e4.
8. e5 – White pushes and chases the knight.
8... d5 – Black hits back in the centre and attacks the c4 bishop.
The lesson goes on for 6 more moves, each with its explanation.
chessGM