Don't tell me we'll need pitch mark tools, Rich?!
Rich is slaying Max Behr over on the private email, so I thought it only fair some of his contemporaries still alive on GCA.com could come to his defense.
Rich wrote:
Mark et. al.
Both USGA/GHIN and CONGU also count hole handicaps, through the use of Equitable Stroke Control (USGA) and Stableford equivalent handicapping (CONGU) so in both cases "outlier" holes are effectively treated as "blobs." The real difference between the two systems is that CONGU requires that all scores submitted be done so strictly under the Rules of Golf and witnessed by another player (Marker) whilst the USGA effectively lets players count any and all scores they want to, without effective validation.
Another important point is that CONGU handicaps are full handicaps (i.e. effectively already incorporating "slope"). USGA has "indices" which need to be adjusted for slope. On courses such as Lundin and Elie (slopes of 130 or so), someone with a USGA index of 7.0 would have a playing handicap of 8.
Cheers
Rich, if I understand correctly, you raise two issues:
1. The validity of USGA and CONGU systems to match-play handicaps.
2. The comparability of USGA and CONGU systems.
I think in both cases the answer is, it depends -- under certain circumstances you are right, but not so under others.
Issue 1
I think for low markers the double-bogey limit under ESC helps fudge but does not solve the essential problem, and when handicaps dictate fixed ESC scores like 8 the distortion may grow significant. ESC truncates the upper distribution by setting a bound; however, the underlying distribution remains and can produce distortions. Scorecard hole ratings simply cover the distribution of allotted shots but do not establish the handicaps in the first place.
Two examples:
Example 1: player scores 3 birdies, 3 pars, but shoots a 90 on a par 72 course. Under the Behr system, this player's handicap is 9; under USGA his (course) handicap is...much higher.
Example 2: player plays first 8 holes in +17, then runs off 9 pars and 1 bogey for a 90. Behr System handicap is 9; USGA course handicap again is much higher.
The USGA handicap is appropriate to stroke play but in match play, with a USGA handicap, this is the guy the handicap chairman chooses to partner with!
Issue 2
Absolutely USGA handicaps can be applied to stroke play in Scotland, thanks to Dean Knuth's rating of the courses over there. As to the comparability of USGA to CONGU, for starters let's just say the handicap player from Lundin Links travels much better than the handicapper from Golf House! The CONGU handicap of someone who plays in tons of tournaments on courses of average difficulty on the other hand might well be "comparable" to a USGA handicap index.
...I think.
Regards
Mark