Anyone can hang a piece, but a good blunder requires thought. There is one sort of move that is almost always played after calm, if not happy contemplation: resigning. Sometimes it is wrong to resign – or to agree to a draw.
It was Tim Krabbe, a great connoisseur of the game who wrote these famous words. He also presented as many as 35 positions to illustrate his theme.*
In the following position in a correspondence game White resigned, thinking his position was hopeless (No, there was no Fritz to help in those days ).
But he would have won.
Georges Mathot – Walter Baumgartner, France 1958, Corr. Game