Speed cubes take what was great about the original ... People who want a different challenge can try the 2x2, 4x4, and even larger cubes, but 3x3 cubes are the de facto standard.) ...
About 18 events involving the speed-solving of 2x2, 4x4, 5x5, 6x6 and 7x7 cubes and extra challenges took place. "Speed-cubers", some as young as seven, tackled the cubes one-handed, blindfolded ...
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