AzB Silver Member
Objectively, much of Efren's well-deserved worldwide renown stems from his dazzlingly inventive and creative ability to extricate himself from difficulties his opponents leave him with, or difficulties (problems) which he has inadvertently imposed on himself.
The useful term heard in 14.1 discussions:"sustained excellence", perfectly describes a prime ingredient (beyond resilience and fitness) for ultra-high runs insofar as it pertains to "staying out of (self-imposed) trouble".
Having been fortunate enough to personally witness more than thirty of Willie Mosconi's Straight Pool exhibition and competition sessions during the 1950s and mid-1960s, I would informedly tell anyone that he got himself into trouble less often than any player the world has ever seen or heard of in the history of pool.
What for better or worse was behind the purity of play he displayed in his prime years -- his "sustained excellence" at 14.1 -- was his near-clinical - but beneficial -- total obsession with Perfection in every element that the game demanded. He was a virtual automaton swiftly but measuredly circling the table like the gifted dancer he actually was. Mistakes of judgment or positional execution were emotionally intolerable to him.
It's seemingly simplistic but actually inarguable that the limits on any world-class champion achieving multiple-century runs, always involve a characteristically sustained ability to stay out of trouble. By that measure even prime Efren would predictably falter under innocent, but statistically inevitable layout dilemmas. Endurance and excellence in long One Pocket back and forth exchanges with an opponent are not a useful or relevant metric to compare or predict a result for hyper-long sessions of any player alone at the table during a 14.1 challenge performance.