Great app but it needs an update..
I like this app a lot, I am 1800 +/- 25 rated player and find it quite entertaining and educative on all Chess Endgames, however it seems to me that in some games and puzzles the build in chess engine stops working and the player is left trying to figure out whether the puzzle is completed or there are more moves that the engine has in mind, in some cases the hint button does not work at all...When this up app is finally updated and iron out those little problems I will gladly give it 5 stars on my next review.