Most different openings by transpositions?

Question

What sequence of opening moves can include most different named Openings or Defenses by transpositions?

For example, I just played a bullet game that went:

1.d4 e5 2. e4 d6 3. Nf3 Nc6 4. Bb5.

In this sequence, we have, in just four moves:

Queen’s Pawn Opening; Englund Gambit; King’s Pawn Opening; Center Game; Philidor’s Defense; Ruy Lopez; Steinitz Defense to the Ruy Lopez;

Very interesting is also:

1.e4 d5 2.d4 c6 (or 2...e6), and so on.

Are there any other similar (or better) examples of this kind?

Sure, but the number of moves increases. One could always go 1.Nf3 and 2.Ng1 to have the Reti included, for example. — A. N. Other, Commented Mar 9, 2020 at 14:12
Take a look at Panov-attack Caro-Kann's that magically enter Queen's gambit territory — David, Commented Mar 9, 2020 at 14:59
I've had more than one game go pirc/modern -> kings indian -> benoni -> benko — Michael West, Commented Mar 9, 2020 at 17:46
I'm not sure of the names of all the openings but I think this one went through a few transpositions: 1.d4 Nc6 2.e4 e5 3.Nf3 exd4 4.Nxd4 Nf6 5.Nc3 Nxe4. Queen's Pawn Game, Bogoljubow Defense, Nimzovitch Defense, Kevitz Defense, Scotch Game, Scotch Four Knights Game. — bof, Commented Jun 15, 2020 at 3:43

Herb · Accepted Answer · 2020-06-14 20:50:33Z

2

Another well-known example is the following:

[fen ""] 
1. f4 {Bird's Opening} 1... e5 {From Gambit} 2. e4 {King's Gambit} 2... d5 {Falkbeer Counter Gambit} 3. exd5 exf4 {King's Gambit Accepted}

A total of 5 distinct names.
Bird's Opening
From Gambit
King's Gambit
Falkbeer Counter Gambit
King's Gambit Accepted

answered Jun 14, 2020 at 20:50

Herb

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Shouldn't that last one be Falkbeer Countergambit Accepted, not King's Gambit Accepted? King's Gambit Accepted would involve exf4.
– D M
Commented Jun 15, 2020 at 2:00
@dm The last move is exf4. That's where it transposes. 3... e4 or 3... c6 are the main lines of the Falkbeer.
– Herb
Commented Jun 15, 2020 at 2:25
OK, I have no idea how I missed the last move.
– D M
Commented Jun 15, 2020 at 11:23

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