Overall rank vs. speed ranks discrepancies

No, it’s calculated completely separately from the speed based ranks and is only affected by your opponents overall rating/ranking

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However, we can take heart in the fact that people do not usually have a
9 stone difference between their live ranks and correspondence ranks,
so we can expect ranks to be inflated no more than one or two stones by
this phenomenon.

I have actually played people who’s overall ranks were 15+ stones above their correspondence ranks. They got to SDK by playing live games, but didn’t play correspondence games so their correspondence rank remained at 25K. The result? My correspondence rank dropping way more than it should when I lose to someone 9 stones stronger than me. This is why I think overall rank is a much better indicator.

Maybe it would be a good idea to make each specific rank provisional until a certain number of that speed of games are played, have the specific rank start out equal to the overall rank at the time of the first game of that speed, and reduce the K-factor of a provisional’s opponent?

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It seems to me the past decisions to:

  1. Grant ratings on 9x9 and 13x13 games
  2. Separate the ranks/ratings for Blitz, Timed and Correspondence
  3. Keep the old single rating separately from the three in #2
  4. Call the old single rating 'overall’
    have complicated the matter, and made understanding of issues/
    problems difficult.

It may be time for a coherent, high-level policy to be established/published, and all above four items to be re-evaluated based on this.

Everyone understands 9x9 Blitz and 19x19 Correspondence could have different characteristics. But the issues are multi-dimensional:

  1. Board size
  2. Game speed
  3. Tournament/Ladder/Other
  4. Multiple / Provisional accounts
  5. Sandbaggers/Airbaggers
  6. Human/Bots
    and the Elo system, originally developed for Chess, does not cope well with such disparities without careful adaptations.

note: Sandbaggers are those who claims/maintains lower rank/rating than his/her true strength for the joy of destroying opponents in games. Airbaggers are those who tries to obtain higher rank/rating than his/her true strength taking advantage of loopholes in rating systems. ‘Airbagger’ term is quite new, might be unique to OGS, and may be a creation of an OGS user, Rikhon.

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Sidenote:[quote=“Tokumoto, post:6, topic:3419”]
Airbaggers
[/quote]

I thought the term was “Heliumbagger” <shrug>

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I thought “Hindenburger” (http://en.wikipedia.org/wiki/Hindenburg_disaster) might be a better naming, but for clarity, it can’t beat airbagger :stuck_out_tongue_closed_eyes:

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you are not completely wrong. your explanation is good and well considered.
BUT: in real life experience i can say that there are enough players with 5 or even 10 ranks difference from live to correspondence or blitz… i understand that OGS is not willing to change all this ranking mess. at least that’s what i get out of all the discussions and chat rooms. But is it that difficult to have an option when limiting rank in a game search to chose whether i want a e.g. 15k overall player or a 15k insertgamemodeofyourchoice player to challenge me.

i saw a 15k blitz game. entered and saw in the ingame chat that he was a 5K… is this supposed to be good user experience?

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Maybe overall rank really should be a weighted sum of the other ranks.

What if someone never plays one or two of the modes?

What if a majority never plays one or two of the modes? Couldn’t we then just get rid of this confusing experimental feature?

Then the weight for that mode is zero and it doesn’t affect the overall rank

I wonder what Wulfenia thinks of this idea. ??

What if someone starts playing all three modes, but then stops playing one of them?

I have to agree, that the difference between ranks is causing issues. I always feel like a sandbagger, when I issue a challenge for a mode that I don’t play too often and it would then show me as 19K. Then the game begins and suddenly… surprise, 14K! I had many people just quitting right away after I send a message in chat showing my ‘real’ rank.

It also leads to the weird situation, that if you lose to someone with an even higher rank discrepancy than yours that instead of closing in, the difference between the ranks is increasing.
It is difficult enough that if you try to explain someone your strength you have to add the site, since ‘14K on OGS’ and ‘14K on KGS’ can be quite a difference, on OGS you have to differentiate even further, ‘14K overall but xxK on live games’?

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That’s one issue. The second one comes when you want to restrict the rank range in a certain game offer. The restriction doesn’t count for the certain game type (blitz, live or corr) but for your opponents overall ranking.

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Gradually the other two modes will take on more weight.

Typically when you inform a moderator of a >3 stone rating difference they will adjust it. I always thought this should be automatic/forced in some way, e.g.

  • no rating can be more than 3 stones lower than your overall rating
  • you have a button to set all your game mode ratings equal to your overall rating
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Agreed. Accounting for rating would probably mitigate most of the problems. Whole History Rating seems to be a interesting approach that produces accurate results.

IMO, if the ratings remain separate, they should at least be crossweighed, so as to increase the other ratings when there is a large jump in one rating. Even if the performance levels at different time control naturally vary, they are still very correlated.

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Honestly, I’m still a beginner anyway, so rank doesn’t mean much, but my life just doesn’t allow me to play in any other way than correspondence. Hence, it’s the only rating that grew, resulting in an overall one that is higher than any of the speed specific ranks.

Some discrepancy can be extremely large. I played with a 25k for correspondence game on a 9 stone handicap, but struggled a lot and then found he/she actually had 15k overall and live ranking. I just quit quickly and felt really wasted my time on that. The system should cap the difference, say no more than 5k difference. 9k to 10k difference is not real.

Indeed, I just requested (and got) my rank manually adjusted by a mod for the same reason – I only played correspondence mostly, and when I started playing live, my live rank was very misleading. (Also, my “correspondence” rank was lagging behind my “overall” rank even though I had only played correspondence, which I found very odd. It really feels like a bug although I think I saw someone claim to explain it once.)