3...Bf5: the Anti-Colle is variation 4 of 6 in the Colle System course, a beginner opening course for White (ECO D04). It runs 23 moves and begins 1. d4 d5 2. Nf3 Nf6 3. e3 Bf5 4. Bd3 Bxd3 …. Black brings the light bishop to f5 before ...e6. White trades it off, castles and pushes to e4 with the queen's help. Then the knight on g5 and the queen aim at h7. 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 with the queen's pawn.
1... d5 – Black meets it in the centre.
2. Nf3 – The knight develops and guards d4 and e5.
2... Nf6 – Black develops too.
3. e3 – The Colle move. It opens the f1 bishop and keeps d4 solid.
3... Bf5 – The Anti-Colle. Black's light bishop comes out before the e-pawn moves.
4. Bd3 – White offers to trade the bishops.
4... Bxd3 – Black takes.
5. Qxd3 – The queen takes back. From d3 it supports the push to e4.
5... e6 – Black opens the way for the dark bishop.
6. O-O – White castles.
6... Bd6 – Black develops and aims at h2.
7. Nbd2 – The knight supports the push to e4.
7... O-O – Black castles.
8. e4 – Now the break works. The d2 knight and the queen both support e4.
8... dxe4 – Black takes.
The lesson goes on for 7 more moves, each with its explanation.
chessGM