I believe Sphinx Crack was created by some drunk locals who did not like the look of the big rock from the town of Pine, so they tried to dynamite it in the early 1900's. Over the years frost wedging has created the crack you see today. As far as Suzuki's ascent, I believe it was on-sight and he placed his own gear and I don't think any one else has freed the crack while placing gear. I live ten minutes from the crack and most people I see on it use it for aid climbing.