Minefield

Noun

1. An area in which land mines or naval mines have been laid.
2. A matter or situation presenting multiple risks, dangers, complications or difficulties.

   "Be careful. Foreign property investments are a minefield, and some people have lost a lot of money."

3. A pitch that has dried out and crumbled and on which the ball is bouncing and spinning unpredictably.
4. A quiz that terminates when the test-taker answers a question incorrectly.