Determine whether the loop will come loose if you remove the red peg (left) or blue peg (right) on its own. Step by step instructions for winding the loop around the pegs are given.

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Determine whether the loop will come loose if you remove the red peg (left), blue peg (right), yellow peg (bottom), or some pair of them. Step by step instructions for winding the loop around the pegs are given.

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Determine whether the loop will come loose if you remove the red peg (upper left), blue peg (upper right), yellow peg (bottom left), green peg (bottom right), or some combination of 2-3 of them. Step by step instructions for winding the loop around the pegs are given.

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