Climbing "Vilná síla" in Žihleský klasik is a serious undertaking. This route, graded 9/9+, represents a significant challenge, demanding a high level of strength, technique, and mental fortitude. The crux probably involves sustained sequences of powerful crimps and precise footwork on the notoriously slippery Žihle sandstone. Success likely requires impeccable body positioning, controlled breathing, and unwavering commitment through the demanding crux sequence. "Vilná síla" is more than just a climb; it's a test of one's climbing prowess in a classic, and often intimidating, Czech climbing area.