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

C41

1.e4 e5 2.Nf3 d6	Philidor:
3.Bc4 f5	Philidor: López
3.Bc4 f5 4.d4 exd4 5.Ng5 Nh6 6.Nxh7	Philidor: López (Jaenisch)
3.Bc4 Be6 4.c3	Philidor: Steinitz
3.d4 f5	Philidor: Counter-Gambit
3.d4 f5 4.Nc3	Philidor: Counter-Gambit (Zukertort)
3.d4 f5 4.dxe5 fxe4 5.Ng5 d5 6.e6	Philidor: Counter-Gambit (del Rio)
3.d4 f5 4.dxe5 fxe4 5.Ng5 d5 6.e6 Bc5 7.Nc3	Philidor: Counter-Gambit (Berger)
3.d4 Nd7	Philidor: Hanham
3.d4 Nd7 4.Bc4 c6 5.Nc3	Philidor: Hanham (Schlechter)
3.d4 Nd7 4.Bc4 c6 5.0-0	Philidor: Hanham (Krause)
3.d4 Nd7 4.Bc4 c6 5.0-0 Be7 6.dxe5	Philidor: Hanham (Steiner)
3.d4 Nd7 4.Bc4 c6 5.Ng5	Philidor: Hanham (Kmoch)
3.d4 Nd7 4.Bc4 c6 5.Ng5 Nh6 6.f4 Be7 7.c3 0-0 8.0-0 d5	Philidor: Hanham (Berger)
3.d4 Nd7 4.Bc4 c6 5.c3	Philidor: Hanham (Delmar)
3.d4 Nd7 4.Bc4 c6 5.a4	Philidor: Hanham (Nimzovich)
3.d4 exd4	Philidor: Exchange
3.d4 exd4 4.Qxd4 Bd7	Philidor: Exchange (Boden)
3.d4 exd4 4.Nxd4 d5 5.exd5	Philidor: Exchange (Paulsen)
3.d4 exd4 4.Nxd4 g6	Philidor: Exchange (Larsen)
3.d4 Nf6	Philidor: Jaenisch
3.d4 Nf6 4.Ng5	Philidor: Jaenisch (Locock)
3.d4 Nf6 4.Ng5 h6 5.Nxf7	Philidor: Jaenisch (Locock Gambit)
3.d4 Nf6 4.Bc4	Philidor: Jaenisch (Klein)
3.d4 Nf6 4.Nc3 exd4 5.Nxd4 Be7 6.Be2 0-0 7.0-0 c5 8.Nf3 Nc6 9.Bg5 Be6 10.Re1	Philidor: Jaenisch (Berger)
3.d4 Nf6 4.Nc3 Nbd7	Philidor: Jaenisch (Hanham)
3.d4 Nf6 4.Nc3 Nbd7 5.Bc4 h6	Philidor: Jaenisch (Jansen)
3.d4 Nf6 4.Nc3 Nbd7 5.Bc4 Be7	Philidor: Jaenisch (Lion)
3.d4 Nf6 4.Nc3 Nbd7 5.Bc4 Be7 6.0-0 0-0 7.Qe2 c6 8.a4 exd4	Philidor: Jaenisch (Sozin)
3.d4 Nf6 4.Nc3 Nbd7 5.Bc4 Be7 6.Ng5 0-0 7.Bxf7+	Philidor: Jaenisch (Lärobok)
3.d4 Nf6 4.dxe5	Philidor: Nimzovich
3.d4 Nf6 4.dxe5 Nxe4 5.Qd5	Philidor: Nimzovich (Rellstab)
3.d4 Nf6 4.dxe5 Nxe4 5.Nbd2	Philidor: Nimzovich (Sokolsky)
3.d4 Bg4 4.dxe5	Philidor: Blackburne
3.d4 Bg4 4.dxe5 Nd7	Philidor: Blackburne (Albin)