If you think that your opponent has made a mistake, and that you can win something for nothing — don’t be too hasty! Your eagerness to get ahead on material may be your undoing.
Some players are adept at setting traps, playing apparently weak moves that conceal a sting in the tail.
1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bg5 e6 7 f4 Qb6 (attacking the white b-pawn) 8 a3!?
This is not very constructive if Black continues quietly, but if his suspicions are not aroused and he goes 8 … Qxb2? then with 9 Na4 the jaws of the trap close around his queen. …
— Tim Harding
For a book, which is worse, being banned, or being designated as out of print? Thank you, Dover, for sparing many timeless gems from a fate worse than being burned at the stake. /s