The
"Flush" in Slalom:
Another type of vertical combination is the three or four gate combination. When more than two, but fewer than five, vertical gates are combined it is referred to as a "flush".
As with the hairpin, a flush can be set "over" and "through", judging from the ideal entry required at the top gate in the combination. Since there is an odd number of gates in a three gate combination, the transition rules are reversed from that of the hairpin.
The
"through" entry provides a cross hill transition, and the
"over" entry does not. A four gate combination functions in the same
manner as the hairpin. It is rarely set although it is perfectly legal.

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