Unblock Container Block Puzzle

Do brainstorming to free blocked red block in the container. The square box is stacked with many wooden building blocks of various sizes. Your task is to slide the wooden or building blocks to unblock me. The ublock is blocked inside a square container and you need to get it out. This is a very popular classic solitaire puzzle that people love to play when they want to relax and play some light games. However, the later levels are quite challenging and you will need to try several times before y...