I’d say there was a little karma involved.
One of the four on Friday , I also played with on Wednesday, I was bemoaning my perceived bad luck ( he actually said he’d never seen anyone get so many bad bounces , lies etc) when approaching the 9th green my Garmin watch beeped and said “ your day is looking up” which guess was a reference to the amount of steps i’d taken.
I let out a sarcastic chuckle and showed him the watch, I’m sure he didn’t really understand why it said that, but he said maybe your luck will change .
The tenth is stroke hole 1 longest par 4 on the course, I hit a really good drive,just behind the 150marker, but a poor second.
It was heading for the front right corner when it landed , bounce left a little and went in!
First time I’ve eagled that particular hole
I'm not sure what your actual question is.
The highest "slope difference" there is 10, which is less than a 9% difference, AND it's the slope, not the course rating, so you're talking about multiplying a differential by either 0.89 or by 0.83. Not a big difference.
So what's your actual question?
I think I figured it out, and emailed back. There was a second accounting for the (CR-Par) term, which caused the discrepancy.
I believe the old system simply truncated the calculated course handicap, always rounded it down. As you said, now its simply rounded, with 0.5 rounding up. But now that we're not using slide rules, we can carry enough significant figures to tell the difference between 0.49 and 0.51, retaining a little more precision than we once did.
Again, when allocating strokes to individual holes, the recommendation is to go off the low handicapper, so nobody is ever having strokes ADDED to his score. This is never an issue with stroke play, the Plus handicappers get strokes added to the total score, but when looking at individual holes, its best to start counting at zero.
This is one interesting thing about the new terminology. Course Handicaps are always used in calculating Net Double Bogey for maximum hole score and Net Par for holes not played. Playing Handicap is used in a competition to allocate strokes. Beyond adjusting for match play off the low ball, Playing handicap may also be reduced from the Course Handicap by some percentage, depending on the format of the competition, as indicated in Appendix C.