with a lot of goodwill 2 star as it is from time to time throughout the building, you can still win against a PC program

I will start with the positives.
To 1) from time to time as already written all building towards a program win (own strength ca. 1800)
2) for about 1 Euro you can not really do much wrong.

Negative is that it does not completely mastered the rules of chess.
1) When a pawn reaches the 8th or 1st row, it is not possible to look for a character from, there will always be automatically transformed into a lady.
2) no draw by 3-fold repetition of position
3) perverse interpretation of the 50 trains draw control (here is given after 25 moves ie 50 half moves draw)
4) No draw when no more material to checkmate is because, for example, K to K + L or K to K + S
5) castling remains possible if the corresponding tower has been drawn, but is back on the original box.

The option for 2 players is in place but it is a offline function.