I'm playing "http://www.chess.com/tactics/server.html?id=88865&practice". After the correct first move Qf1, white should play KxN but moves instead to b3 and cuts my rating. Something wrong here.
If Kxd3 then ...Ba6# The computer moves only postpones the inevitable checkmate.
Thanks, I've got it now.
I'm playing "http://www.chess.com/tactics/server.html?id=88865&practice". After the correct first move Qf1, white should play KxN but moves instead to b3 and cuts my rating. Something wrong here.