I have a concrete parking pad in my back yard (butts up to an alley) that is substantially larger than I need, and I'd like to reclaim some of that space for my yard. To that end I'd like to tear up half the pad but leave the other half untouched, preferably with a semi nice edge to it.
So what's the best way to cleanly cut a concrete patio in half, so that I can tear up one side?