Live ranked game PGN uses incorrect ratings

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Eebster

Specifically, the PGN file includes WhiteElo and BlackElo information, but gives the ratings after they have been adjusted due to the outcome of the game, and possibly also due to other games finished during that game (I haven't tested this). In any case, it ought to show the ratings the players had at the time the game began, not at the time it ended.

MSC157

You mean, here on chess.com? I don't think so, unless you change it everytime by hand.

Eebster

It happened twice in a row in PGNs chess.com generated from live games I played on the mobile app for Android. For instance, as you can see, my standard Elo is currently 1615. Before my last game, it was around 1580 against' my opponent's 1565 (roughly), but the PGN has [WhiteElo "1529"] and [BlackElo "1615"]. Here is the entire PGN file in plaintext:

[Event "Live Chess"]
[Site "Chess.com"]
[Date "2014.12.02"]
[White "Transpiercer"]
[Black "Eebster"]
[Result "0-1"]
[WhiteElo "1529"]
[BlackElo "1615"]
[TimeControl "15|10"]
[Termination "Eebster won on time"]

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Bb4 5.Qc2 c6 6.e3 h6 7.Bh4 O-O 8.Nf3 Nbd7 9.a3 Be7 10.Bd3 Rb8 11.Bg3 Ra8 12.O-O c5 13.Rfe1 b6 14.Rad1 Ba6 15.b3 cxd4 16.exd4 Rc8 17.Nd2 Bxa3 18.cxd5 Nxd5 19.Bxa6 Rxc3 20.Qa2 Be7 21.Bb7 N7f6 22.Nb1 a5 23.Qb2 Bb4 24.Re5 Rc7 25.Bxd5 exd5 26.Rf5 Rc8 27.Bh4 Qd6 28.Bxf6 gxf6 29.Rd3 Qe6 30.Rg3+ Kh7 31.Re5 fxe5 32.Rh3 exd4 33.g3 Qxh3 0-1

I got the PGN just by clicking the "Get PGN" button on this site.

MSC157

Oh yes, I get what you mean, now. There's nothing you can do about it. Just looks at previous game and (as I said before) adjust it by hand. 

Eebster

There's nothing I can do about it, but I was just pointing the problem out to the site developers, since presumably there is something they can do about it, and this is the Site Feedback forum.

Am I correct in assuming this is not working as intended?

Martin_Stahl
Eebster wrote:

There's nothing I can do about it, but I was just pointing the problem out to the site developers, since presumably there is something they can do about it, and this is the Site Feedback forum.

Am I correct in assuming this is not working as intended?

It has been that way the whole time I've been playing here. The rating that shows in the PGN is the rating after completing the game. I think the justification is that value is the more "correct" playing strength of the players and the more accurate rating.

Eebster

But that gives you no information about the stakes of the match itself, and it is not the way FIDE ratings are reported in any other context. It also simply isn't accurate. That game of mine was not played between a 1615 and a 1529. That rating wouldn't even have passed my filters. Ratings change over time, and whatever they may have been after the conclusion of the game, the PGN should show what they were when we started.

Martin_Stahl
Eebster wrote:

But that gives you no information about the stakes of the match itself, and it is not the way FIDE ratings are reported in any other context. It also simply isn't accurate. That game of mine was not played between a 1615 and a 1529. That rating wouldn't even have passed my filters. Ratings change over time, and whatever they may have been after the conclusion of the game, the PGN should show what they were when we started.

Games and ratings in a FIDE/USCF situation normally took place over a very short time frame (one day, one weekend, one week) and they don't make changes to ratings after each game, it is for the whole event. And the new ratings aren't even available until the event gets rated (though an estimate can be calculated).

For something like live, it doesn't really matter as much, probably either could be used succesfully. In Online/correspondence, it is another matter. You may be currently rated 1500 (or were when you started a game), but be playing at 1800+ strength with your rating lagging your performance (due to the fact other games are not finished).

I'm not familiar with other correspondence rating system. How do they do it (e.g. ICCF)?