[vadansky]

At first I thought this was stupid, but after giving it a try it's addicting. It's great to get instant feedback on a move you aren't sure about.

Edit: Is there a variant of this without limit the piece you can move? Basically I just want the instant feedback without getting told which piece to move.

[vitomd]

Yes, I also made this http://tacticalchess.vitomd.com/ that it will alert you when there is a tactical opportunity for you to win material.

Other of my projects http://vitomd.com/blog/projects/