Don’t buy anchors and don’t pull with chain, cut a starter piece 3 inches wide and the width of trench. Put a diagonal cut in it and then use a small bar or screw driver to put in cut. Put a little twist on it and pull straight up. The rest you can hook with a bar and flip out. I wouldn’t recommend 2 ft x 1 ft if your not in shape or have a not so strong back. Also if there is any stairs your going to want to down size. When I slab saw any commercial business and 2 wheel dolly pieces out we do 2 ft x 1 or 2 x 2 up to a ft thick. Your basement I doubt is better then 4. PM me and I’ll send you my number. I have all tools needed be and can patch back. Will also take concrete with me and recycle it at my shop.