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Backgammon and variants.

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18. 七月 2006, 23:34:07
LionsLair 
题目: Re: top 100 in all 6 types
Marfitalu: guess I'll need to complete 6 more b'gammon games to make this list then... :o)

18. 七月 2006, 23:23:23
LionsLair 
题目: Re: top 100 in all 6 types
Hrqls: I take it this is all 'established BKR' rankings?

18. 七月 2006, 22:41:01
grenv 
题目: Re: top 100 in all 6 types
Marfitalu:

18. 七月 2006, 22:36:42
grenv 
题目: Re: top 100 in all 6 types
Marfitalu: Mainly because anti is silly. I think many more would play the others. I don't play race much but could be persuaded if the moves were quick.

18. 七月 2006, 22:26:45
Walter Montego 
题目: Re: top 100 in all 6 types
Hrqls: I'm not sure what to make of your advice for making neat columns. I'll re-read it and try to put it into use soon. If I have trouble, I'll post some questions on the Computer discussion board.

Thank you very much for narrowing the columns. It all fits into the window now and I don't have to scroll sideways at all. Makes it a lot easier to compare the various numbers and people. Plus the other posts on the page are back to more managable widths too. For some reason, one wide post box and they do it to on my screen.

18. 七月 2006, 22:16:52
Hrqls 
题目: Re: top 100 in all 6 types
Walter Montego: ok changed it .. i copied it from excel (in which i made the list) to notepad (to remove the borders) and then into the brainking box .. this copying added tabs between the columns .. i now replaced the tabs by spaces (2 or 3) by hand

to make the columns come out ok you will have to used a fixed width font (most of the times courier is used for that) .. that way the letters and numbers and spaces all have the same width .. otherwise the 'i' and 'm' and ' ' all have different widths .. to achieve this you can place the text between 'pre' tags .. just like 'i' tags make a text italic will the 'pre' tags make the font of fixed width

18. 七月 2006, 21:45:02
TC 
题目: Re: top 100 in all 6 types
TC修改(18. 七月 2006, 22:53:23)
Hrqls: Good job again, thank you for your effort, as before you've done it!

18. 七月 2006, 20:18:15
Walter Montego 
题目: Re: top 100 in all 6 types
Walter Montego修改(18. 七月 2006, 20:21:21)
Hrqls: Would you be so kind as to narrow the gap between the columns so that I don't have to scroll so much horizontally to view your post, nor deal with the extra width until your post has cleared the front page? Just a few spaces per column should shrink it down to fitting on the page.
Thank you.
It's very nice how you are able to line up the columns. How are you able to do that? It'd come in handy for some of my posts and messages on this site, but everytime I type them lined up they don't appear that way after I post or send them.

18. 七月 2006, 19:54:20
Hrqls 
题目: Re: top 100 in all 6 types
Hrqls修改(18. 七月 2006, 22:17:23)
A new list of all players who are in the top 100 of all 6 gammon variants (sorted by average ranking) :



Name Back Nack Anti Race Crowded Hyper Average
Marfitalu 2274 24 1987 7 2044 3 2015 6 1964 12 2183 27 2078 13
Pedro Martinez 2248 37 2019 5 1938 10 2026 5 1873 37 2277 2 2064 16
Hrqls 2280 18 1970 12 1889 15 1970 15 2024 6 2163 46 2049 19
arpa 2270 48 2028 4 1721 35 1981 10 2128 1 2190 23 2053 20
laszlo 2277 21 1867 55 1934 12 2070 3 1885 33 2254 7 2048 22
Incognito 2201 83 1983 8 1974 7 1976 14 1968 11 2196 21 2050 24
basplund 2208 82 2018 6 1991 5 2010 7 2004 7 2153 59 2064 28
TC 2256 30 1885 43 1937 11 1948 23 1983 8 2159 53 2028 28
chessik 2238 50 1851 65 1846 19 1824 86 1976 10 2174 39 1985 45
whikki 2189 98 1873 52 1852 16 1880 49 1846 49 2171 40 1969 51
Vikings 2200 84 1825 81 1964 8 1837 78 1798 70 2145 71 1962 65


i know it would have been better to take the top 10% or something like that, but that was way more work ;)

18. 七月 2006, 15:28:47
nabla 
题目: Re:
grenv: Maybe the math is that it defines what is a completely superior player !

18. 七月 2006, 15:26:11
grenv 
题目: Re:
gambler104: Maybe, but I'd love you to show me tha math behind the numbers.

18. 七月 2006, 04:35:03
gambler104 
题目: Re:
grenv: The cube decisions are definitely harder. But there is still a lot of luck even with the cube in hyper. In regular backgammon, a completely superior player will beat a weaker player 9 out of 10 times or more if they play a 7 point match with the cube. In hyper, I would say that number goes down to about 7 out of 10.

18. 七月 2006, 01:40:46
skipinnz 
题目: Re:
alanback: I'll have to take another look at Hyper and try it with the cube.

18. 七月 2006, 01:01:10
alanback 
题目: Re:
grenv: Definitely a thinking man's game, with the cube.

18. 七月 2006, 00:51:57
grenv 
题目: Re:
alanback: agreed, my rating shot up when the doubling cube was introduced. In fact in hyper there are more difficult doubling decisions than in regular backgammon I think.

18. 七月 2006, 00:20:10
alanback 
题目: Re:
grenv: Correct.

skipinnz: I felt the same way until I started playing hypergammon with the doubling cube. I think adding the cube makes skill predominate over luck, assuming the match is long enough (say 7 points or more).

Also, of course, all luck evens out over time, so with enough experience, skill differences will still emerge.

18. 七月 2006, 00:04:04
skipinnz 
题目: Re:
alanback:When I said it wasn't the same, I was really refering to the chance/luck factor in Hyper. Too many doubles remove any skill factor IMHO

17. 七月 2006, 23:51:19
grenv 
题目: Re:
alanback: As could Nackgammon.

17. 七月 2006, 23:30:34
alanback 
题目: Re:
skipinnz: Hyper is in fact a subset of regular backgammon, since it would be possible (though unlikely) to reach the hyper starting position at the end of a backgammon game.

17. 七月 2006, 22:27:33
Hrqls 
题目: Re: top 100 in all 6 types
LionsLair: *nod* i even started to make a little program which would create those lists automagically .. but it got a bit stalled :)

the variants are definetly different
mostly they concentrate more on a specific aspect of ordinary bg

crowded and race more about building, race from the start, crowded from a specific point .. hyper is more about aggressive play and counting the chances to succeed or be hit .. nack is a bit more about the backgame than ordinary bg

but then again i am not a pro .. i only play this game for about 2 years .. and almost only on this site :)

17. 七月 2006, 21:56:38
skipinnz 
题目: Re:
grenv: I for one definitely wouldn't class Hyper as the same, as the other variants of gammon.

17. 七月 2006, 17:17:47
gambler104 
题目: Re:
grenv: I wouldn't go as far as calling them essentially the same. The share many similar qualities but each has its own, unique strategy.

17. 七月 2006, 17:17:31
LionsLair 
题目: Re: top 100 in all 6 types
Hrqls: I remember this list...it is one of the main reasons I started playing regular b'gammon, as I wanted to be ranked with the likes of the top players as well, but never played in all 6 variants to even get recognized as one of them...

17. 七月 2006, 16:05:46
grenv 
题目: Re:
KotDB: Good point about the rating medians, but that could be simply fixed by adjusting ratings for each game.

Personally I don't like crowded backgammon (takes too long) so I'll never win the pentathlon. Problem is many people only play 1-2 variants.

As far as the pentathlon analogy goes, it would really only work if there were 5 very different games, but these are all essentially the same.

17. 七月 2006, 15:59:34
pentejr 
题目: 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. 七月 2006, 10:02:03
Hrqls 
题目: 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. 七月 2006, 04:32:55
Thad 
题目: 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. 七月 2006, 04:21:03
Peón Libre 
题目: 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. 七月 2006, 04:08:10
Thad 
题目: 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. 七月 2006, 04:00:26
Peón Libre 
题目: Re:
Ouch. I didn't mean to post that all in bold. If I weren't a pawn I would fix that.

17. 七月 2006, 03:59:38
Peón Libre 
题目: 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. 七月 2006, 03:12:14
grenv 
题目: Re:
grenv修改(17. 七月 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. 七月 2006, 03:09:49
Thad 
题目: 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. 七月 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. 七月 2006, 01:57:09
Thad 
题目: 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. 七月 2006, 01:46:23
Peón Libre 
题目: 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. 七月 2006, 00:15:47
Chicago Bulls 
题目: 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. 七月 2006, 00:08:16
Chicago Bulls 
题目: 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. 七月 2006, 00:01:54
Peón Libre 
题目: 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. 七月 2006, 22:52:12
alanback 
题目: 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. 七月 2006, 19:08:49
Hrqls 
题目: Re: Leaving on top?
SafariGal: i wouldnt be surprised if he was #1 of one of them in the past though :)

16. 七月 2006, 14:52:30
SafariGal 
题目: 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. 七月 2006, 10:33:52
Hrqls 
题目: Re: Leaving on top?
Vikings: hehe .. he will just tumble down head first ;)

15. 七月 2006, 01:50:17
Vikings 
题目: Re: Leaving on top?
alanback: you can't leave, you aren't on top of all of your stairs

14. 七月 2006, 23:37:02
gambler104 
题目: 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. 七月 2006, 22:51:21
alanback 
题目: Re: Leaving on top?
LionsLair: I hope I am here long enough to see you accomplish your goal!

14. 七月 2006, 20:49:30
Hrqls 
题目: Re: Leaving on top?
LionsLair: dont worry, i will be there with you :)

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

14. 七月 2006, 19:57:58
LionsLair 
题目: 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. 七月 2006, 19:00:49
Sylfest Strutle 
题目: World Championship
TMG is showing some of the matches live from the World Championship in Monte Carlo.

12. 七月 2006, 19:50:57
alanback 
题目: 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!

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