The Obstacles mission is hard--that's one reason that teams get multiple
tries to accomplish it.

The key is Rule 37--In.  "In" has a very specific meaning for FLL

   - Red is "in," "into," or has "reached" Blue if any bit of Red is
   directly over or under Blue
   - To be "in" an area is to penetrate the volume over that area.
   - Barely "in" is considered "in" unless "completely "in" is required.
   - Red can be "in" Blue without touching Blue..
   - "Outside" is the opposite of "in" and means completely out.

I tell teams that a robot is "in" Base when a single molecule of the robot
is "in" Base.  The same applies here.  The word "completely" means
that every single molecule satisfies the scoring condition.

Referees will use the definition of "in" to evaluate whether any tiny bit
of the robot is "in" the area east of the colored line.  If so, then the
robot will not have crossed completely over the line.  Contact with the mat
is not important for "in". (That's important for "touching". )

For your last case, "all of the robot" is defined--it is every bit of the
robot.  But the scoring condition does not require the robot to be
"completely in" the colored scoring region--it only requires that all of
the robot has "crossed completely over" the line (from the west).

[If that hint is too vague, look at Game Update 11--some parts of the robot
don't have to be "in" the scoring region for the robot to earn points.]


Steve Scherr****

VA/DC FLL Referee Advisor


On Thursday, September 19, 2013, Tom Hafer wrote:


>  Hey Steve –
>
>

>    **The obstacles challenge – the rule says The robot has crossed
> completely over the west line of the noted region, from the west only.  I
> think this needs some discussion. The robot often gets a bit skewed when
> crossing the obstacles, so what does completely crossed over mean?
> Specifically, what if some portion of the robot not in contact with the mat
> is outside the colored zones? Next case, what if one of the tracks / wheels
> does not cross the obstacle or half of the wheel crosses but the other half
> is out. Last case, once the robot has crossed the line, what portion of the
> robot has to be inside the zone: all of it (how defined?), the part in
> contact with the mat, or just some of it?
>

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