Respin is triggered when six or more chip symbols appear during a single spin within the base game.
Respin begins with three spins, which are reset to three when extra chips land. When the respin counter reaches zero or when all 40 stops contain chips, the game is done.
Re-spin begins with four rows from the bottom, and as further chips land, additional rows become accessible.
The following number of chips will unlock rows at the end of a spin:
10 total chips unlock 5th row
15 total chips unlock 6th row
20 total chips unlock 7th row
25 total chips unlock 8th row
Figure: Feature in the Respin