Here is a good webpage to demonstrate what the author rightfully calls, “The Ultimate Blunder.” These are games where a player resigned in a winning position! Of course, the position looks lost but it goes to show that sometimes you should make the person prove they can win the game. Unfortunately the answer/winning moves are right next to the diagrams so you might want something to cover them up. Go and view these positions and see if you can find a way out where these players could not. The site can be found at http://www.xs4all.nl/~timkr/chess2/resigntxt.htm
Have fun!
Until next time….
Tom Fleetwood