03-23-2011, 06:45 PM | #1 |
Never Been Pretty
Join Date: Jan 2005
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Chess Skill Levels
Inspired by http://forums.sjgames.com/showpost.p...96&postcount=9 and the fact that I'm working on a character that's a Chess Grandmaster, I wanted to figure out how to translate FIDE ratings into GURPS skills.
To do so, I started with two assumptions. 1. FIDE 2500 is the same as GURPS skill 15 2. Playing a game of chess is represented by a Regular Contest Starting with skill 15 and mapping the probable outcome of a Regular Contest with the probable outcome of a game of chess, I got the result listed below. Where a range of FIDE ratings is listed with one skill level, the rating furthest away from 2500 was calculated from 2500 while the other rating was calculated from the previous skill level. In other words. For skill 18, 2767 was calculated from 2678 while 2785 was calculated from 2500. And for skill 12, 2157 is calculated from 2500 and 2197 from 2300. The highest ever recorded FIDE rating was 2851 and belonged to Garry Kasparov. All research was made on Wikipedia. 19: FIDE 2856-2896 18: FIDE 2767-2785 17: FIDE 2678-2682 16: FIDE 2589 15: FIDE 2500 (minimum Grandmaster) 14: FIDE 2411 (minimum International Master 2400) 13: FIDE 2260-2300 (minimum FIDE Master 2300) 12: FIDE 2157-2197 What do you think? |
03-23-2011, 07:21 PM | #2 |
Join Date: Jan 2010
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Re: Chess Skill Levels
Your skill levels seem low. Kasparov is the "confirmed top master of all time" which would be skill 22.
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03-23-2011, 07:37 PM | #3 | |
Join Date: Aug 2004
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Re: Chess Skill Levels
Quote:
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03-23-2011, 08:04 PM | #4 |
Join Date: Jul 2006
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Re: Chess Skill Levels
You need to run it from the other direction.
GURPS tells us that a games such as chess is an IQ Easy skill. So the default is IQ-4. An adult of normal intelligence playing chess at the default level has a rating of about 800 (this is very well established). A rating difference of 200 points gives a winning probability of 75% (by the definition of Elo). More reference points. The average chess club member in North America has a rating of about 1100, the average tournament player about 1350. In Russia the average club player is about 1700. Somebody should have the stats for quick contests by skill difference. |
03-23-2011, 08:39 PM | #5 | |||
Never Been Pretty
Join Date: Jan 2005
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Re: Chess Skill Levels
Quote:
I don't know how the current rating system compares with earlier rating systems, but the current system has only been used for less than 40 years and according to Wikipedia the first rating system saw use in 1933. So unless you know something I do not, we can only be certain Kasparov is Top Master Alive. If we instead set 2500 as skill 16, 2851 would fall under skill 20, and 12 would go as low as 1993. Quote:
Quote:
According to the formula I found at Wikipedia, a rating difference of 200 gives an expected score of 0.76 which for Regular Contests is close enough to say a 76% probability to win in. On the other hand, if 2500 is 16, then 1100 would be 4 and that’s seems very low. Where did you get your info that 800 is default adult rating? Last edited by Dragondog; 03-23-2011 at 09:02 PM. |
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03-23-2011, 09:00 PM | #6 |
Never Been Pretty
Join Date: Jan 2005
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Re: Chess Skill Levels
It should be added that the rating doesn’t rate your actual skill level, it rates how well you’ve played so far. So there may be a discrepancy between your actual skill level and the skill level derived from your rating.
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03-23-2011, 09:07 PM | #7 |
Join Date: Jul 2006
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Re: Chess Skill Levels
Actually running the numbers I get +3 on a quick contest giving a winning percentages of 75.735%, so that is almost perfect for a 200 Elo difference. Makes it easy:
Code:
Elo Skill 800 6 1000 9 1200 12 1400 15 1600 18 1800 21 2000 24 2200 27 2400 30 2600 33 2800 36 3000 39 |
03-23-2011, 09:12 PM | #8 |
Never Been Pretty
Join Date: Jan 2005
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Re: Chess Skill Levels
Are you trying to tell me that a grandmaster needs a skill of 30? That's way too high! And I'm using Regular Contests.
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03-23-2011, 09:16 PM | #9 |
Join Date: Nov 2009
Location: GMT-5
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Re: Chess Skill Levels
This comment and a dollar can get you a cup of coffee, but:
I'm probably rated around 1550 and knowing GURPS as I do would say I have about an 11 skill level. I'd probably peg Master at 15, International at 16-17, and Grand at 18+. |
03-23-2011, 09:32 PM | #10 |
Never Been Pretty
Join Date: Jan 2005
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Re: Chess Skill Levels
Some quick numbers with grandmaster as skill 18 based on the probabilities given by the rating system.
22: FIDE 2896 21: FIDE 2785 18: FIDE 2500 (grandmaster) 16: FIDE 2318 14: FIDE 2135 12: FIDE 1921 10: FIDE 1739 8: FIDE 1556 6: FIDE 1342 |
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