Slalom Instructions

Rules: The challenge is to draw a loop around the grid, subject to the following rules:

1. Dotted lines represent gates which may extend for multiple cells. The line must pass through all gates, not turning in the same cell.
2. Some gates are numbered and must be passed in sequence, according to the number of the gate.
3. Circled numbers represent both start and finish of the loop.
4. The line may only travel vertically or horizontally.