I was part of the testing team of this guess the move feature, and I agree it's very good.
Nice to hear that! Is there a chance chess.com adapt that feature as well? What shall it take to be added here?
I played one of the free games, and it was quite interesting. However, it could use some improvent: the gui and the chess engine used are outdated, it would be nice if it would explain in what way your wrong guesses are poor, and an elo estimation would be more familiar than the point system. That's where chess.com can step in and introduce the feature in an even better form.
It says it's in beta stage. Perhaps improvement will come especially as it's offered for premium users. At the moment, chess.com interface is still the best.
it has it now just go to a live game and guess the move make it on the board