Is the computer cheating??

Hmm.. i'm not sure that was the issue b/c it would allow me to move my other pieces but not that particular one. If it happens again I will screen shot to show the board. Thanks for repying!
Trying to figure out why they wouldn't let me use my pawn to capture my opponents (the computers) knight. It was a diagonal move. In fact it wouldn't let me move the pawn at all. Anyone know why?
It could be a temporary pin.

Trying to figure out why they wouldn't let me use my pawn to capture my opponents (the computers) knight. It was a diagonal move. In fact it wouldn't let me move the pawn at all. Anyone know why?
Probably it was pinned - capturing the piece would be an illegal move because by moving a pinned piece your king would be in check.

Trying to figure out why they wouldn't let me use my pawn to capture my opponents (the computers) knight. It was a diagonal move. In fact it wouldn't let me move the pawn at all. Anyone know why?
It could be a temporary pin.
Trying to figure out why they wouldn't let me use my pawn to capture my opponents (the computers) knight. It was a diagonal move. In fact it wouldn't let me move the pawn at all. Anyone know why?