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17. Juillet 2006, 15:59:34
pentejr 
Sujet: Well, shoot...
My goal was to get into the top 50 in all gammon variants except anti and then start an invitational, multi-point, random gammon tournament with those 5 variants, inviting only those who were also top 50 in all 5. Even that list was very small at the time--5 or 6 players when I looked. But I'm not there yet, and alanback is leavning. Oh well.

17. Juillet 2006, 10:02:03
Hrqls 
Sujet: Re: Leaving on top?
Thad: in december we had a somewhat similar list.

i dont think the 'show subject' link worked at that time already .. and i am not sure if alanback was on this site for real already :)

anyway here are 2 posts with lists :
http://brainking.com/nl/Board?bc=26&ngi=448298
http://brainking.com/nl/Board?bc=26&ngi=448120

17. Juillet 2006, 04:32:55
Thad 
Sujet: Re:
KotDB: I suggested those to Fencer once. He didn't seem to interested. :-(

I would LOVE to have them on my main page right between my 'Your best BKR' & 'Your best rating positions'!

17. Juillet 2006, 04:21:03
Peón Libre 
Sujet: Re:
Thad: Yes, it is. It's too bad BrainKing doesn't use the Glicko rating system -- we could get RDs into the mix.

Perhaps, rather than looking at BKRs directly, we should look at percentile ranks.

17. Juillet 2006, 04:08:10
Thad 
Sujet: Re:
KotDB: Your second point is an excellent one.

I suppose you could compare each player's BKR in each game to the mean and find out who has the highest weighted average above each mean, highest deviation, or something similar.

This is getting quite complicated. ;-)

17. Juillet 2006, 04:00:26
Peón Libre 
Sujet: Re:
Ouch. I didn't mean to post that all in bold. If I weren't a pawn I would fix that.

17. Juillet 2006, 03:59:38
Peón Libre 
Sujet: Re:
Thad, grenv: I thought of that, and I see two problems.

First, if we're attempting to answer alanback's original question, I think we have to have some requirement of experience in all five games. Otherwise our newly crowned Champion-Of-All-Five-Positive-Gammon-Games will be, depending on whether we count provisional BKR in individual games, either 02i (who has provisional BKRs in three games and is unrated in the other two) or sergey82 (who has a very high established BKR in Backgammon but has not played the other four games). Would you declare someone the winner of a pentathlon if he had only participated in one or three of the five events?

Second (and perhaps more important), it is meaningless to directly compare a BKR from one game to a BKR from another game. Even though we all started with BKRs of 1300, the rating distributions tend to drift upward over time, and this does not necessarily happen at the same rate for all games. As of a few minutes ago, the median ratings on the lists of established BKR were 2044 for Backgammon, 1714 for Nackgammon, 1703 for Backgammon Race, 1677 for Crowded Backgammon, and 2029 for Hyper Backgammon. This suggests, for example, that a BKR of 1700 in Crowded Backgammon is better than a BKR of 2000 in Backgammon. Any comparison of BKR weighted by number of games played will be biased in favor of those who play mostly Backgammon and Hyper Backgammon.

I claim that linear combinations of BKRs can be meaningfully compared only if the weighting is the same for each player.

17. Juillet 2006, 03:12:14
grenv 
Sujet: Re:
modifié par grenv (17. Juillet 2006, 03:13:43)
Thad: Yes it would seem so, but I only skimmed the thread since so many messages were new.

But I disagree that the rating would be provisional just because one type was missing or low number of games. We need to stipulate that the games are essentially the same for this exersize.

17. Juillet 2006, 03:09:49
Thad 
Sujet: Re:
grenv: Might I suggest the following:

BKR * games played for each variant.

Then add the total and divide by total games played.


Isn't that what I said? ;-)

17. Juillet 2006, 03:08:07
grenv 
Might I suggest the following:

BKR * games played for each variant.

Then add the total and divide by total games played.

People playing only one variant are therefore not punihed and a somewhat realistic BKR is reached (i.e BKR based on 25 games not counting for as much as one based on 500 games).

17. Juillet 2006, 01:57:09
Thad 
Sujet: Re: Leaving on top?
KotDB: Weigh the BKRs based on the number of games of each type played. That should give a decent BKR for all types. If a player has not played at least four (since that's what BK requires to have a rating in any game) games of each particular variant, then they would be unrated for purposes of this discussion and if they have not completed at least 25 games of each type, then they would be provisional. I'm not sure if anyone has completed enough games of all types, but perhaps someone else can look that up. ;-)

17. Juillet 2006, 01:46:23
Peón Libre 
Sujet: Re: Leaving on top?
Chicago Bulls: No, not zero. The default BRK is 1300.

Yes, of course it's a question of definitions. This whole thread has essentially been about how to define overall strength in these five games. I've proposed one plausible quantitative definition. It's obviously not perfect; it inherits all the flaws of the BKR system, and it may have additional ones. I'm not convinced it's the best definition, but I haven't thought of one which is clearly better.

17. Juillet 2006, 00:15:47
Chicago Bulls 
Sujet: Re: Leaving on top?
KotDB: One reasonable measure of overall strength might be average BKR across the five games. I doubt you'll find anyone who can top alanback's 2160.

And what if someone has not played 3 variants for example? We will put 0 to calculate his mean BKR value? So i don't think this is a reasonable way.....
And to measure what...? Overall strength? How do you define overall strength......?

17. Juillet 2006, 00:08:16
Chicago Bulls 
Sujet: Re: Leaving on top?
alanback: Leaving on top? Well yes if you define top as the top 5. But no, if you define it to be number 1. If you define it as the best overall with statistics on Brainking then probably yes.....
If you define it generally then no, we don't know for sure.....

You said: "I have been in the #1 spot in most of them at one time or another in the past"
The point is: If you start reminiscing the past for successes then you are already history!

Anyway it's a shame you will leave, but oh well. You know better:-) Do you intend to return someday.....?

17. Juillet 2006, 00:01:54
Peón Libre 
Sujet: Re: Leaving on top?
SafariGal: But what if no one ranked #1 in one game has sufficiently strong credentials in the others to be considered the best overall player? As it turns out, of the five top-ranked players, only arpa has established BKRs in all five games. Do you really consider 54th, 4th, 10th, 1st, and 24th better than 5th, 3rd, 2nd, 5th, and 4th?

One reasonable measure of overall strength might be average BKR across the five games. I doubt you'll find anyone who can top alanback's 2160.

16. Juillet 2006, 22:52:12
alanback 
Sujet: Re: Leaving on top?
SafariGal: Well, I asked for your opinion and you gave it. Thanks for your view. One reason for my posting was that I did feel somewhat deficient in not being #1 in any variant.

However, as has been pointed out, I have been in the #1 spot in most of them at one time or another in the past. Most recently I was #1 in Backgammon Race about a month ago.

16. Juillet 2006, 19:08:49
Hrqls 
Sujet: Re: Leaving on top?
SafariGal: i wouldnt be surprised if he was #1 of one of them in the past though :)

16. Juillet 2006, 14:52:30
SafariGal 
Sujet: Re: Leaving on top?
alanback: it would seem fair to me that someone claiming the "top" would at least be #1 ranked in 1 of the variants. It appears to me you are not!! So I refute your claim. Your claim is a personal assessment of yourself and others and it not the perception of others. I would consider you "very very good" at best. Far far better than I

15. Juillet 2006, 10:33:52
Hrqls 
Sujet: Re: Leaving on top?
Vikings: hehe .. he will just tumble down head first ;)

15. Juillet 2006, 01:50:17
Vikings 
Sujet: Re: Leaving on top?
alanback: you can't leave, you aren't on top of all of your stairs

14. Juillet 2006, 23:37:02
gambler104 
Sujet: Re: Leaving on top?
alanback: Well, I am not quite as good as you alanback, but I also hope to get there some day. I am top 30 in crowded, race, and hyper, but my backgammon and nackgammon rankings are rather low.

14. Juillet 2006, 22:51:21
alanback 
Sujet: Re: Leaving on top?
LionsLair: I hope I am here long enough to see you accomplish your goal!

14. Juillet 2006, 20:49:30
Hrqls 
Sujet: Re: Leaving on top?
LionsLair: dont worry, i will be there with you :)

(maybe i already was in the past ? ;))

14. Juillet 2006, 19:57:58
LionsLair 
Sujet: Re: Leaving on top?
alanback: leaving on top is a good thing, but given a little bit of time(because I haven't completed as many games as yourself) I think I can make it into the top 5-10 players in 6 of 6 of the gammon variants(including anti-)
...and if not, the level you raised the bar to will be fun trying to accomplish...

14. Juillet 2006, 19:00:49
Sylfest Strutle 
Sujet: World Championship
TMG is showing some of the matches live from the World Championship in Monte Carlo.

12. Juillet 2006, 19:50:57
alanback 
Sujet: Re: Leaving on top?
Chicago Bulls: I would amend your comment to say that eventually neither of us will care to make any claims, since we will have left ego behind; otherwise, I can't contradict you!

12. Juillet 2006, 19:20:49
Chicago Bulls 
Sujet: Re: Leaving on top?
alanback: I'm presently in the top 5 in all 5 positive gammon games, and there is nobody who is ahead of me in two of them. Anyone else have a better claim?

I have one: I claim that there is a number of years from now that both of us will would not be able to make any more claims....
While many can question your claim nobody can do the same with mine....

12. Juillet 2006, 18:32:36
alanback 
Sujet: Leaving on top?
I've decided to quit playing here and on Dailygammon to save time for other interests. Since I'm finishing my games and tournaments, I'll still be around for quite a while; but as I survey my standings here, it seems to me I have a pretty good claim to be the top player of gammon games (excluding antibackgammon) on the site. I'm presently in the top 5 in all 5 positive gammon games, and there is nobody who is ahead of me in two of them. Anyone else have a better claim?

10. Juillet 2006, 20:03:49
Adaptable Ali 
Sujet: Re:
Hrqls: Yes i posted my post on the Brainking board, and he said the same, but thank you anyway. Lo)

10. Juillet 2006, 09:47:11
Hrqls 
Sujet: Re:
WatfordFC: i asked fencer and he told me that such tournaments (with entry fees (brains)) wont be removed over time .. they will just keep waiting until enough players are signed up

he will fix this so that the tournaments will be removed after time and when that happens then the players will get their entry fees returned to them

9. Juillet 2006, 20:25:56
Hrqls 
Sujet: Re:
WatfordFC: ah ok ... then i dont know either .. good question :)

9. Juillet 2006, 19:51:46
Adaptable Ali 
Sujet: Re:
Hrqls: The brains are deducted as soon as you put your name down for the tournament.

9. Juillet 2006, 19:51:07
Adaptable Ali 
Sujet: Re:
Vikings: Yes i am sorry, i didnt explian it correctly, yes your correct , i was talking about a non-started tournament.

9. Juillet 2006, 19:22:42
Hrqls 
Sujet: Re:
Vikings: lol .. neither do i .. even the 2 of us combined have zero brains ;)

9. Juillet 2006, 19:22:00
Vikings 
Sujet: Re:
Hrqls: don't ask me, I don't have any brains

9. Juillet 2006, 19:19:43
Hrqls 
Sujet: Re:
Vikings: ah! thats true .. never thought about those tournaments which dont start :)

when does the player actually pay the brains ? when the tournament starts or when (s)he signs up ?

9. Juillet 2006, 19:18:29
Vikings 
Sujet: Re:
Hrqls: I think that she is talking about tournements that some people sign up for that never get enough people to start and eventually time out on the tournement page

9. Juillet 2006, 19:13:21
Hrqls 
Sujet: Re:
WatfordFC: when doesnt a game go ahead ? does a game ever stop without giving a winner & loser or as a draw ?

9. Juillet 2006, 12:37:47
Adaptable Ali 
If you sign up to a game where brains are required for the entry fee, and the game doesnt go ahead, do you get your brains refunded?

6. Juillet 2006, 13:42:20
lovelysharon 
we made many moves per day.. .lol... took a lot less than 22 years.. lol ... also was over way before any action points...

6. Juillet 2006, 02:10:06
Kili 
Sujet: Re:
grenv: I hope that you are a good mathematician who do bad sums

6. Juillet 2006, 02:02:33
grenv 
Sujet: Re:
Matarilevich: Yes. April 12, 2052

6. Juillet 2006, 02:00:20
Kili 
Sujet: Re:
grenv: Could you calculate the end of this match?

6. Juillet 2006, 01:55:47
grenv 
Sujet: Re:
Matarilevich: 3 days per move x 996 x 2 + vacation = about 22 years. Good thing they moved a little quicker, but still.

6. Juillet 2006, 01:51:42
Kili 
Sujet: Re:
WatfordFC: 996 x 2 = 1992 + win = 1997 points for $$$ Jason $$$

6. Juillet 2006, 01:48:10
Adaptable Ali 
Sujet: Re:
Matarilevich: OMG!! lol WOW

6. Juillet 2006, 01:44:09
Kili 
Sujet: Re:
WatfordFC: Maybe Jason us Sharon 996 moves

6. Juillet 2006, 01:38:32
Adaptable Ali 
Does anybody know what the most moves in anti-backgammon is??

5. Juillet 2006, 22:10:00
jryden 
Sujet: Re: illegal move?
grenv: Okay, I didn't consider that distinction. I was just looking a the bug list and saw a similar comment about it related to crowded. Well then, good for me :)

5. Juillet 2006, 22:05:59
skipinnz 
Sujet: Re: illegal move?
jryden:not illegeal as you used both dice , just good luck you could bear off.

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