Is it possible to create better tactics training puzzles by allowings users to create the "human version" starting from the computer-generated example? Here's an example where the computer defence misses the beautiful point:
http://en.lichess.org/training/57679
1.Ng5 Bxg5 2.Bxg5 f6 human defence (2...Kg8 computer defence 3.Bxd8) 3.Bxg6 Rf7 4.Bxf7 fxg5 5.Re8+! Beautiful interference/deflection Qxe8 (5...Bxe8 6.Qf8#) 6.Qf6#
http://en.lichess.org/training/57679
1.Ng5 Bxg5 2.Bxg5 f6 human defence (2...Kg8 computer defence 3.Bxd8) 3.Bxg6 Rf7 4.Bxf7 fxg5 5.Re8+! Beautiful interference/deflection Qxe8 (5...Bxe8 6.Qf8#) 6.Qf6#