Have not found any other modern/retro chess games that feature a "resistance training" kind of method to help improve gameplay. The King will "adapt" to your skill level, and make the ocassional blunders, mimicking a human opponent.
After you play against the King, the Queen will review the entire game move-by-move and make suggestions on what moves would have been better, or praise you for making an excellent move. All this, done in 3D mode and natural voice. I have never forgotten it, and would love to play it again on modern PCs.