Ai-Petri (main peak) via the central wall with traverse of the teeth, 5a cat. diff.

R0–R1: From the pine tree near the Hosta-Bash spring, a slanting earthy ledge with a pine tree growing out of it is visible. Ascend to the pine tree via moderately difficult rocks with ledges, then via a vertical 40-meter chimney (very difficult rocks, pitons). From the pine tree:

• 10 m right along the ledge,
• then up an inside corner for 25 m to another pine tree, with moderately difficult rocks. Then:
• move to a large slanting inside corner,
• ascend to a grotto (40 m), difficult rocks. The grotto overgrown with holdfast bushes remains on the right. 1-2