Great idea, not fully developed

This is a great crowd sourcing app for chess tactics (puzzles). This is its strength but also its biggest weakness. There is no great mechanism to filter out spurious tactics. The app seems to be abandoned from the support perspective. It lacks basic features like allowing castle in solutions, or easy to navigate chats. It would not allow multiple solutions. Overall however it has some brilliant tactics, and is definitely enjoyable.

Pradaktay about Chess Tactics and Lessons