Online since 2002. Over 3300 puzzles, 2600 worldwide members, and 270,000 messages.

Bandaged BrainballBrainballs with several pieces glued together. There are 12 meaningful variants. 6 are implemented here.
BrainballSpin the number ring, and twist the ends to flip seven of the thirteen numbers over.
Küblbeck BrainballAn advertisement for whole sale traders for car spare parts in east Bavaria and Upper Austria.

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