QUOTE(eaglecabport @ Sep 10 2008, 12:39 PM)

I was looking online but was hard to find out exactly what I am trying to understand.....................
Here in the USA, you:
1. Calculate each round's total score differential (score minus rating)
2. Adjust for the slope (which uses 113 as the 'base' level then adjusts for course difficulty) to arrive at your index for that round.
3. Then you take your best 10 of your last 20 index differentials, average them
4. Multiply the resulting average by 0.96 (????? - never understood this but this is not my question)
Oh yeah, they also use the "Equitable Stroke Control" which, in my case with a course handicap typically slightly over 10, means for submitting my card for handicap purposes, I never take more than a 7 on any hole, regardless of my score for the hole or the par of the hole. I shot a 79 the other day (par 68, rating 66.8, 117 slope) and had a 10 on a par 5 (don't ask, it was ugly) so for handicap purposes, I had to reduce the 10 to a 7 and therefore submit a score of 76, playing to a 8.9 for the day rather than an 11.8.
The "slope" is intended to build upon the course rating (eg, a course rating may be 70.7 on a par 72 - shows diffuculty) and the idea is to say that a harder course will disproportionately hurt a higher handicap player than a lower one. Hence, if the rating is, say 135, then you take your differential (say, score 85 on the course with a 70.7 rating and 135 slope), your differential is 14.3. You then adjust for the slope, by 14.4x(113/135)=11.9. So here, you played to an 11.9 index for that course.
The result and intent is to arrive at your "potential" but not your average. According to some I have read, this means you should only play at or under your handicap around 25% of the time.
I know in France they also use slope and rating but not sure if their handicap calculation is the same as well or not.
So.................
How does this compare to that of the UK or Europe?
I have seen that you appear to need to keep your card as they adjust each hole for handicap to end up submitting your net score that way or something. I have also understood from my reading on this site that handicaps in UK are usually higher than the equivalent golfer in the USA (maybe the typical USA ego is a reason the USGA went for potential rather than average).
I am trying to find out:
1. If they have a system of a certain number of recent scores used (to compare to the last 20 we use in the USA)
2. If "yes" to question 1, then do they use only a portion of those scores or do they use all for the ensuing calculation?
3. Do they use some sort of slope system?
4. Do they use Equitable Stroke Control or an equivalent to allow for "blow up holes"?
My USGA index is 9.5 but my "average" of my last 20 differentials (adjusted for slope and equitable stroke control) is 12.4 (yes, I am inconsistent). I am wonding what would be closer to comparing in the UK or Europe.
Thanks in advance for any input!!!
Hi again,
I thought I'd try to start at the beginning since my I don't my last posts told the whole story. So here it goes:
Regulating bodies:
USA: USGA - rules & handicapping
All of Europe: R&A - rules
GB & Ireland: CONGU - handicapping
Continental Europe: EGA - handicapping
You've described the US handicap system better then I can. The only point I'd like to add is that the chance of a USGA index playing their handicap is about 17%, one shot better is around 9%, 2 shots better 4% and 3 or more 2%.
CONGU (Council of National Golf Unions) system:
The CONGU handicap is the handicap granted to members of golf clubs which are affiliated to the four home unions, England, Ireland, Scotland, and Wales.
It is based on the Stableford scoring system. A double bogey on any hole for a scratch player means 0 points for the hole (or a triple on any hole for a 18 handicap), you can't get minus points - so that's how you end up with the Nett Double Bogey Maximum concept.
Each course has a Standard Scratch Score (SSS). SSS is the score that a scratch player is expected to return in ideal conditions. This is equivalent to course rating, except it is always a round number (you can't shoot 70.4, but can score 70 for example). The allocation of SSS is the responsibility of the Home Union, for example in England the EGU determines the SSS for a course.
A golfer has to post 3 cards, attested by a club member, played according to strict rules to get a handicap. So if you score 9, 10 and 11 over on a course where a par round is the SSS you would get an exact handicap of 10.0 and a playing handicap of 10. (an exact handicap is the player’s handicap calculated to one decimal place, the playing handicap is the exact handicap calculated to the nearest whole number with 0.5 and up rounded upwards).
Their ongoing handicap is calculated using the SSS and the Competition Scratch Score (CSS) combined with a player’s scores from medal and Stableford competitions (the medal scores being converted to Stableford for handicapping purposes. CSS is the score that a scratch player is expected to return taking into account the specific conditions of the day (for example particular weather conditions). CONGU have detailed formulas used to calculate the CSS (it's basically based on what percentage of players had a nett score of the SSS+2 or better...but this is where the computer comes in, as the CSS system is weighted towards the results of players from the better handicap categories).
To calculate the new handicap after a competition, the following system is used:
Category Handicap Range Buffer Zone Reduction Per Shot Increase Per Round
1 0.1 -> 5.4 +1 -0.1 -0.1
2 5.5 -> 12.4 +2 -0.2 -0.1
3 12.5 -> 20.4 +3 -0.3 -0.1
4 20.5 -> 28.4 +4 -0.4 -0.1
So let's say our 10.0 golfer was playing and the CSS was a par round. If he gets between 33 and 36 points his handicap stays the same. 32 & under make him a 10.1. For every point over 36 his handicap is reduced by 0.2. Let's say he played great...11 pars, 6 bogeys and a birdie. 5 over par and 41 points. New handicap 9.0. When you're used to the system and not bad with figures you pretty much know where you stand straight after your round. The only variable is the CSS which you couldn't know until the very end. In the above example if the CSS was one under par, our player would then be a 9.2, if it was one over par he'd be an 8.8. In my experience the CSS is normally par or one under...so as I said you pretty much know where you stand as soon as you've signed your card.
There is a last and very important point. I think it's what you referred to when you asked in a later post if you were missing something about this system - that someone could practice a lot and improve without playing in any or enough tournaments to have this properly reflected in his handicap.
As has been stated in other posts the vast majority of golfers in GB & I are members of a club (to be honest for the regulating bodies the others probably don't exist anyway...sad but true). Under CONGU Rule 19.1 should the Handicap Committee of a player’s home club consider that a player’s exact handicap is too high and does not reflect the individual’s current playing ability, they must, subject to the provisions of the CONGU Unified Handicapping System, reduce the exact handicap to a figure considered to be appropriate. So let's go back to our 10.0 (now 9.0) golfer with his 41 points and 5 over round. The Handicap Committee could be aware or made aware of the fact that this golfer recently always gets around in about 5 over. They would then be obliged to reduce his handicap - to 5.0 if they felt appropriate.
The maximum handicap allowed under CONGU is 28 for men and 36 for ladies.
This took too long to write but I hope it explains everything properly.
A quick word on the EGA system. They basically modified the British system. It's Stableford based (so the nett double bogey thing applies) but they adopted the USGA course rating and slope system instead of SSS. If you go into a clubhouse in Germany for example you'll always find a table that shows how many shots each handicap gets from differing sets of tees at that course. So handicaps 14.7 - 15.6 may get 17 from the back tees and 16 from the members' tees for example. The system is also basically competition based and instead of CSS they have CSA (Competition Stableford Adjustment). It is also a very complicated system by which a computer uses a formula to evaluate all the nett scores from the competition to decide if the course played to par or a shot or two easier or harder. Alphabet soup CSS/CSA - the 2 systems are basically the same. I say basically competition based because under EGA rules, handicaps of 4.5 or above, can register for an Extra Day Score at their club. They have to register in a list and then are obliged to return a card. I think this works like one of the first 3 rounds in the CONGU system.
Final summary - IMHO the British system is the toughest. Once you've got your handicap with your 3 cards, it's purely competition based. You've got to do it under the gun, often playing with strangers who want to beat you more than anything. There are just less opportunities to cheat, mark your score on a hole wrongly or even make an honest mistake with the rules etc.. You know that every shot counts and you can't disappear after the round and pretend you weren't there. In the US I've often heard the concept of someone being a good 3 or 5. Under the CONGU system if you're a 3 or a 5 you are good. As for the EGA system, I'm very sceptical about the extra score days - they'd be a nice idea if everyone played in the spirit of the game. But I've played with many people in Germany who were simply not as good as their handicaps. You can more often than not see when someone's having a bad day and not playing to their normal level. These people either returned grossly flawed cards in tournaments or (ab)used extra score days.,As to slope helping you play a fairer match against someone significantly better or worse than you on a tough layout...there's no arguing - it's an advantage.
Hope this helped and I haven't bored you to death.