[QuickSilver]

Maybe he got full run of the house too quickly. If he has an accident, you have to restrict him back to a smaller area. And you definitely can't get let him get away with it, because if your house smells like pee, it's like hanging up a sign saying, "Please toilet here". Are you using an enzyme cleaner?

If he goes on square-shaped things, it sounds like he is trainable - he's just trained to the wrong thing! Thor is pad trained, but I think it's easier to train to go outdoors exclusively. Do you have a firm plan in place? Bell, scratching at the door, taking him out every two hours, etc?

For about two months, I used moving boxes to "gate" certain areas of my apartment off. I literally spent close to a month almost entirely in my living room, because that was the only room Thor was allowed in. I gradually increased his area to my entire apartment, but if he had an accident, I moved the boxes back to shrink the area. It was ugly, but effective.