Invalid puzzle found
This app is great, some of the puzzles are extremely challenging. But today I got a puzzle that had two correct solutions (two ways to get the mate-in-2), and the one I picked was deemed incorrect. I quintuple checked it and used the computer analysis feature (very handy) and I was right. A valid tactics puzzle only has one solution. Developers please take care. I wish there was an email address to point this out.
hyperal about
Chess Tactics Pro (Puzzles), v1.05