Object: Move the colored buttons from hole-to-hole and from surface-to-surface to position. Any three different colors on each surface but finish with no entangled elastic strings. Three of the same color on each surface but finish with no entangled elastic strings. Any two of the same color on each surface but finish with no entangled elastic strings. While moving the buttons from surface-to-surface the strings get entangled creating a knot inside. To finish, you must untangle the knot so all elastic strings go straight through the middle of Brainstring Advanced and they do NOT touch each other.
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