Almost perfect: 9/10

I have "chess tactics pro" which is exactly the same app but for chess problems. The only difference is I can turn on a computer opponent on the chess app which can play me, and prove to me why my move is bad (or very rarely prove that Im right and simply found a longer alternate). If this app had a playable computer it would be perfect.

Bobbybob32134282 about Tsumego Pro (Go problems)