If you are willing to contribute more problems, I'll be happy to include them mentioning the origin.
2. e5 Ke7
3. ?
2. e5 Nf6
3. ?
Hint: In progressive chess Nh6 (or Nh3) is more usual than Nf6 (or Nf3).
2. e5 e4
3. Bg5 Bxd8 Bh4
4. ?
2. c5 Nh6
3. d4 Bxh6 dxc5
4. ?
2. d5 Nh6
3. Qg4 Qxc8 Qxd8+
4. Kxd8 e5 Ke7 a5
5. d4 dxe5 Kd2 b3 Ba3+
6. Ke6 Ke5 Bxa3 Bb2 Bxa1 Bc3+
7. ?
2 e5 Bxb4
3 a3 axb4 Nh3
4 Nf6 Ne4 Nc3 Nxd1
5 ?
If you want another good problem, here's one I played the other day. Black to mate on his 8-move series.
1 e3
2 Nf6 d5
3 Qg4 Qxc8 Qd8+
4 Kxd8 Nc6 Nb4 Nxc2+
5 Kd1 Kxc2 Ba6 Bxb7 Bxa8
I believe black is without a defense in this position. I played:
6 d4 dxe3 exf2 fxg1=Q Qxg2 Qxa8
A clever try, but white mated with the nice continuation:
7 Nc3 Nd5 Nxf6 Re1 Rxe7 Re8 mate
After the game, however, he said he thought he would also win with the continuation:
7 Rf1 Rxf6 b4 b5 b6 b7 bxa8=Q+
Now black can mate with a very nice 8-move series (the first move of which has to get himself out of check.)
Your comments are welcome!