A general time setting:

Start_time + N_period * ( Byo_yomi / Moves_per_period ) + eXtras

They'd have to decide on the (range of) values for S, N, B, M, X.

It really makes a lot more sense for blitz to have its own rating. As it is, I wonder if it doesn't scare people off trying competitive blitz because they're going to damage their normal rating with it if they fail. There's a reason so many people keep a separate account for blitz games.

Of course, that also means there should be more blitz tournaments. As far as I know they're fairly rare. That might be the main reason a separate rating never happened.

You number show up immediately how hard it would be to reach consensus. To me, blitz is anything where the game can expect to end in less than 15 minutes. 15 minutes to one hour would be considered normal on a server. But for a game which contributed to any rating to which I gave much credence I would want the game to last at least 90 minutes and preferably longer.

This is one reason why I don't have much faith in online rankings except as a general guide.

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Still officially AGA 5d but I play so irregularly these days that I am probably only 3d or 4d over the board (but hopefully still 5d in terms of knowledge, theory and the ability to contribute).

I think it would be great if the AGA supported dual rankings and encouraged blitz tourneys or side events. I think the kids would love it, and it would help grow our game.

And I dont even like blitz.

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- Brady
Want to see videos of low-dan mistakes and what to learn from them? Brady's Blunders

So, how do you quantify?
I know that you can easily see that you overlooked stuff and blundered here and there, but this is now what I am talking about.

Lets look at an example.

You play a 100 moves fast, and make 7 mistakes which you would not make in slower games. But how do you say that 3 of these mistakes were 3k level, one was 7k level, and the rest were 5k level? And how do you then calculate that this brings you down from 1k to 4k? How does the formula go? When you look at a mistake, how do you tell exactly what level this mistake is?

Also - as part of the equation - how do you account for your opponent making mistakes, and these in turn inducing your mistakes? Or maybe allowing (and even inducing) your brillant plays, which you would have had no chance to play in slower games?

So - how do you account for some possibly (much?) better moves which your intuition (or your opponent) allowed you to make when the brain was not involved in the decision making? I know for a fact that some of the moves I make in fast games can actually be better than the moves I would make in similar situations if i thought more.

All we can see from fast games is that "I blundered, overlooked atari, lost a group, and lost the game, would never have happened in a slower game" - but what does this really mean for your overall move level average? It seems to concentrate on the decisive blunder the most. But is that correct?

Is that also influenced by the difference in the way you approach the game? For example: intuitive vs calculated players? Or those relying on memorizing shapes vs memorizing sequences? Stuff like that...

I find it really interesting.

PS>
The monkey is really cool!

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- Bantari
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WARNING: This post might contain Opinions!!

Bantari, as I said, it's just my feeling.
If you want some actual numbers, be my guest:
grab a bot -- the best current ones are around 4~6 stones from pro on 19x19 ? --
and do some statistical analyses to find out the relative levels
when you play it at different time settings.
The procedures are very simple; it's the logistics --
bot availability, human operators, time, etc. -- that take effort.
Enjoy and let us know your findings.

One problem is that the average loss per move is quite small per stone difference in strength, so that a nine stone difference means a loss of around one point per move on average. So what about a move that loses 30 points?

Suppose that you or I make 7 4-5 kyu plays that we otherwise would not make. That would bring our play down by about 1/2 stone. OTOH, we could make a single play that loses that much and not even notice.

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The Adkins Principle:
At some point, doesn't thinking have to go on?
— Winona Adkins

Visualize whirled peas.

Everything with love. Stay safe.

Someone could play a bunch of games under blitz and slow time controls and then post them without the time stamps (I don't know if you can remove them from the file or would have to manually create a new sgf) and ask stronger players to identify which games are which. Could be interesting.

When this system was prepared I considered also that it is possible to give the EGC main tournament a higher weight like 1,25, but the I thought not to make an exception for one tournament.

Based on Ed's feeling that he plays 2-4 stones weaker in blitz games, wouldn't that be more or less true for everyone else too? That's the primary reason for wanting separate ratings, correct?

But if everyone's rating drops a couple of stones, then the relative rating difference between each other would be relatively unchanged, and in any rating system, the only thing that matters would be this relative difference and the win/loss probabilities of that difference.

If the difference is unchanged, I see no need to have separate rating calculations.

No, and that's the point.

Some people would play 2-4 stones weaker (in absolute terms) like Ed, others 3-5 weaker, and still others 1-2 weaker.

This, by the way, is why most of the stronger MCTS bots are using accounts with a relatively fast clock. If the hardware is powerful enough to get then over the hump (below a certain amount of playouts, MCTS becomes erratic) that optimizes their performance relative to humans. With longer clock settings they would play a bit stronger in absolute terms but "diminishing returns" sets in quickly. So in the range of time being considered, they gain less than humans given the additional time.

Out of these time ranges, could be quite different.