Hmmm... I Didn't Know That

Recently, an opponent in one of my games at Chess.com made a slip, a move that would hang his Queen.

He messaged me to let me know.

I messaged back that in a friendly game, I would allow a take back.

When I explored the chess website, however, I learned that a player could not take back a move, or allow his opponent to take back a move.

Unless the game was against one of their bots.

I didn't know that.

I wasn't sure what to do next.

So, I offered my opponent a draw.

(In all fairness, had it been a Jerome Gambit game, I would probably have taken the full point.)