TalkChess.com

[Shivkumar Shivaji]

Thanks for the fixes. Quick feedback:
Rather than simply mentioning that the coach thinks that you have blundered, it might be better to have an option (before the game start) which indicates the thresholds to look for. Then depending on the option the user selects, either the wrong move and the right move along with the difference in scores can be annotated on the PGN screen or simply be passed to the user.

Example: The coach thinks you have blundered. Score in position after optimal move is +1.5. Score after your move is -1. Would you like to take your move back?

or the above message is stored in the PGN window as a comment. In essence, the game would be blunderchecked live.