This is of course old stuff but it is new to me. I still think Chernev's "Logical Chess Move by Move" is a great book. I am not trying to make fun of a truly classic book. Anyhow, something odd seems to be going on in the very first game in the book. Black builds up a scary looking attack and white approves of the attack by resigning.
I should be a well known fact that any move is at least as strong as resigning. In this game white appears to have a move that is even better than resigning:
Semifinaler i PRO Chess League
2 hours ago