To chain-select

ChainEdges options
AutoChain	Selecting a curve or surface edge automatically selects all curve segments connected with the level of continuity set by the ChainContinuity option.
ChainContinuity	Controls the level of continuity required between segments to be selected with the AutoChain option. Direction Forward Selects curves in the positive curve direction. Backward Selects curves in the negative curve direction. Both Selects curves in both the positive and negative curve direction.
GapTolerance	If the gap between two edges/curves is less than this value, the chain selection will ignore the gap and will select the next segment.
AngleTolerance	When Continuity is set to Tangency, if the angle between two edges/curves is less than this value, the chain selection will consider the criteria for continuity met and will select the next segment.
Undo	Undo last segment selection.
Next	Select next segment.
All	Select all segments.