We had this rock pointing out on our lawn. After several unsuccessful attempts with the chisel and drill I decided that it needs to be cracked in order to dump it below lawn level. I've put about 30kg charkoal around it and left it glowing for about 5 hours before I gave it a cold shower. And voilà, it cracked immediatly. Now it's just to smoothen the terrain and the summer can come 🌞