Why were dead-end passages and false burial chambers added to pyramids?

Dead-end passages and false burial chambers were added to pyramids to deter thieves and protect the actual burial chamber of the pharaoh from being looted. The complex layout was meant to confuse potential robbers and make it harder for them to find the true tomb. Additionally, these features were thought to have symbolic and mystical significance in guiding the pharaoh's soul to the afterlife.