1. Buy a BrainBreaker
2. Print it (or copy by drawing by hand)
3. Solve the BrainBreaker (optional with hints)
4. Fill in the code on the corresponding page and open the lock!
BrainBreakers are especially difficult. The designer likes to give people a real challenge. Most BrainBreakers can be solved with only sharp logical thinking. The perfect fit for everybody who gets bored by regular (too easy) puzzles, riddles and games.