18...Kg8 19.Qa4 g6 20.Bc1 Qf8 21.Be3

20...Kd8 21.Bb5 Bxb5 22.Rxb5 Nd6 23.Rb1

21.Rxc7 Bxc7 22.Rxb7 Rb8 23.Qxc7 Rxb7

23.exf5 Qf6 24.Qa4+ Kd8 25.d6 Rc8

23...Kd8 24.exf5 Qxf5 25.Rbc1 Nd6 26.Bc5

1) Source tags are just tags in the PGN, and remain hidden in most display programs.

(Maybe <CG> could display them on a game page?)

Here's an example from a game I've recently found:

<

[Source "Alta Daily CA v11 N8 1859-01-09 p4 c3"]

>

So, just add such a tag for game submissions.

I suppose a correction slip can be used for games already in the DB, using the "other" feature.

2) After some protracted advocating and lobbying <CG> adopted the feature, so it doesn't strip out the tag. At the time there was also discussion about the conventions to use, with the intent of adding a guidance page on <CG>.

This all came to naught.

There is the Z-base "de facto" convention, which borrows heavily from Zavaratelli’s bibliography of Kolisch:

https://zanchess.wordpress.com/2016...

Here are some more examples:

https://zanchess.wordpress.com/2016...

Now, I've also adopted a couple of other conventions worth noting

a) <G<nnn>> for tracking Game Number in periodicals and/or tb (tournament book).

b) <tb G<nnn> <pp>/<pp>>

This is for tournament books, where I just use tb as an abbrev. Note the double page numbers, <pp>, the first being the conventional, the second being the page number in the PDF (usually coming from ChessArch ref - or yours).

I recommend this, as it's very, very convenient to have the number to navigate directly to the game in the PDF.

c) < source1 / source2 / source3 >

I might use this when I get the PGN from <CG>=<source1>, but find a more definition source, say <Harding>, who in turn also gives the original contemporaneous source <source3>.

So, I used <CG>, but we have a chain of increasing authority.

Far more details then you might have wanted, but I find it a useful system which I'd like other chess historians to utilize.

Great. A convention that all biographers should adopt.

<I am merely trying to find the original publications of the over 70 games in the CG DB.>

Hmmm, just curious if this is scattershot, or for a given tournament/match or two.

<IMHO, the Source Tag should be available in the Administrator Game Editor section.>

Agreed. But if the <Source> tag were in the PGN, it would be easy for <CG> to promote it for easy viewability. And likewise, if <CG> had a slot on an editor page, it would be trivial to inject it into the PGN.

<For the time being, I will document my sources in the Game Collection: Morphy - Maurian where it is more accessible.>

Like <MissS>'s comment elsewhere. Better than nothing, but I think there's a fundamental flaw with this approach, which I'll elaborate elsewhere.