It depends on what difficult is...really...everyone has a different idea of what makes for difficult greens. I am of the opinion that a course can be great with only good greens that are subtle and not overly difficult.
I reckon I have played what I consider 39 great courses in GB&I. I would guess less than two handfuls (maybe one handful) have a diffcult set of greens. Name the GB&I courses with difficult greens.
I am far more interested in varied greens which are firm and true.
Ciao
+1
variety is the spice of life
Golf courses and greens do NOT have to be difficult to be great
Hopefully one day courses will be judged by their varied interest and varied challenge -a challenge(for an expert) could be can you make three on this seemingly easy finishing hole-while giving the long hdcp a chance to go out on a high note (#18 Prestwick,North Berwick, Kington)
I just about puke every time I watch a PGA Tour course that finishes with a 480 par four with water down the left and bunkers on the right.
Every 5 years they play the biggest event in the world on TOC and often shoot lights out-Every great player has won there and nearly always produces a great event and winner (whatever that is)
That said, it does have interesting greens manitained at reasonable pace that would create more strategy if they would stop growing rough
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I love interesting greens that have actual overall tilt and/or plenty of slope-which can creat strategy off the tee Those kind of greens work best when greens are maintained at a speed of10 or below. Of course they can be amped up for an event, but then you are reduced to the most benign of pins.
Generally modern greens attempting slope end up with tiers with minimal slope to keep a ball on them, which is NOT the same as an overall slope maintained at a lower speed.