On bouldering

I'm reading this book called "Stone Crusade". It's gives a brief overview of American bouldering history and highlights a few influential areas and people. The first pioneer of American bouldering was a guy named John Gill. He used to be a gymnast an is extremely strong. Here an excerpt from one of Gill's writings:
"Basic upper-torso exercises include the front lever, the one-arm chin, the slow muscle-up, and the one-arm mantel-press. Some desirable additional exercises are the cross-mount (butterfly mount) on the still rings and the one-arm front lever. The dedicated boulderer will cultivate squeeze-grip chins on beams of varying width, one-arm finger-tip chins on door sills, and one-arm, one-finger chins on a bar."
According to Gill I think I'm only half of a beginner.
This is the one-arm front lever.