[robocup-small] Rules clarification: Goalie contact

[Christopher Head]

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As written, yes, those all count as interference with the goalie—it
doesn’t matter where the ball is. It is blue’s responsibility to get
out of the way if yellow’s goalie wants to move, period. It’s therefore
quite dangerous for a blue robot to go into yellow’s defense area,
though legal if you’re careful.

In all cases, though, remember that this only counts if the point of
contact is within the defense area. The goalie cannot ram an opponent
just outside the defense area—even if the goalie is partly inside the
defense area, as long as the point of contact is outside, the rule
doesn’t apply.

While this may seem a bit extreme, this rule has been on the books
since 2006 and, in my experience from attending the last few years of
RoboCup, “interference with the goalie” is called from time to time,
but not excessively often.

Chris

On Mon, 8 Apr 2013 15:15:03 -0400
Juan Pablo Mendoza <jpmendoza at ri.cmu.edu> wrote:

> Hi Chris,
> 
> I have a followup question to this. Does *any* contact with the
> goalie in the defense area result in a free kick for the goalie's
> team? In particular, consider these situations:
> - The ball is in yellow's defense area. A blue robot and the yellow
> goalie are in it too. Yellow goalie then drives quickly into the ball
> (blue robot may be stopped), and in the process makes substantial
> contact with the blue robot.
> - The ball is in yellow's defense area. A blue robot and the yellow
> goalie are in it too. Yellow goalie then intentionally drives into
> the blue robot, not minding the location of the ball.
> - The ball is NOT in yellow's defense area. A blue robot and the
> yellow goalie are in yellow's defense area. Yellow goalie then
> intentionally (or unintentionally) drives into the blue robot.
> 
> Would all of these result in an indirect free kick for yellow?
> 
> Thank you,
> JP
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