Chess is a scientific game and its literature ought to be placed on the basis of the strictest truthfulness, which is the foundation of all scientific research. — W. Steinitz

C25-C28

**C25**
1.e4 e5 2.Nc3	Vienna:
2…Bb4 3.Qg4	Vienna: Zhuravlev
2…Bc5	Vienna: Anderssen
2…Bc5 3.Qg4	Vienna: Anderssen (Giraffe)
2…Bc5 3.Na4	Vienna: Anderssen (Hamppe)
2…Bc5 3.b4 Bxb4 4.f4 exf4	Vienna: Anderssen (McDonnell)
2…Nc6	Vienna: Lange
2…Nc6 3.d4	Vienna: Lange (Fyfe)
2…Nc6 3.g3	Vienna: Lange (Paulsen)
2…Nc6 3.f4	Vienna: Lange (Gambit)
2…Nc6 3.f4 exf4 4.d4	Vienna: Steinitz
2…Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 b6	Vienna: Steinitz (Fraser-Minckwitz)
2…Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 b6 6.Nb5 Ba6 7.a4 g5 8.Nf3 Qh5 9.Ke1 Kd8 10.g4	Vienna: Steinitz (Bauer)
2…Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 d5	Vienna: Steinitz (Zukertort)
2…Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 d5 6.exd5 Qe7+ 7.Kf2 Qh4+ 8.g3 fxg3+ 9.hxg3	Vienna: Steinitz (Chigorin)
2…Nc6 3.f4 exf4 4.Nf3 g5 5.Bc4 g4 6.0-0	Vienna: Hamppe-Muzio
2…Nc6 3.f4 exf4 4.Nf3 g5 5.Bc4 g4 6.0-0 gxf3 7.Qxf3 Ne5 8.Qxf4 Qf6	Vienna: Hamppe-Muzio (Dubois)
2…Nc6 3.f4 exf4 4.Nf3 g5 5.h4 g4 6.Ng5	Vienna: Hamppe-Allgaier
2…Nc6 3.f4 exf4 4.Nf3 g5 5.h4 g4 6.Ng5 d6	Vienna: Hamppe-Allgaier (Alapin)
2…Nc6 3.f4 exf4 4.Nf3 g5 5.d4	Vienna: Pierce
2…Nc6 3.f4 exf4 4.Nf3 g5 5.d4 6.Bc4 gxf3 7.0-0 d5 8.exd5 Bg4 9.dxc6	Vienna: Pierce (Rushmere)

**C26**
1.e4 e5 2.Nc3 Nf6	Vienna: Falkbeer
3.f3	Vienna: Falkbeer (Walkerling)
3.a3	Vienna: Falkbeer (Mengarini)
3.g3	Vienna: Falkbeer (Mieses)
3.Bc4 Bc5 4.Nd3	Vienna: Falkbeer (Spielmann)

**C27**
1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4	Vienna: Falkbeer
4.Qh5 Nd6 5.Bb3 Nc6 6.Nb5 g6 7.Qf3 f5 8.Qd5 Qe7 9.Nxc7+ Kd8 10.Nxa8 b6	Vienna: Falkbeer (Frankenstein-Dracula)
4.Qh5 Nd6 5.Bb3 Nc6 6.d4	Vienna: Falkbeer (Adams)
4.Qh5 Nd6 5.Bb3 Be7 6.Nf3 Nc6 7.Nxe5	Vienna: Falkbeer (Alekhine)

**C28**
1.e4 e5 2.Nc3 Nf6 3.Bc4 Nc6	Vienna: Falkbeer (Three Knights)