[robocup-small] the rule of "Two defender in defence area"

[Carlos Saith Rodriguez]

Hello friends

I agree with Yonghai, this rule has created many inconveniences and clashes between the teams and that's not good for our community.

The proposal is good, but it needs to be very specific. for example, in any situation in which the defender touches the ball inside the defense area was penalized.

More over it is necessary to define exactly when a robot is in the defense area: when the robot touches the line delimiting the area or when 50% of the robot is inside the area.

We must find a solution to decrease the subjective interpretation of the referee.

Regards

Saith Rodriguez
STOx's Team Leader



> Date: Wed, 21 Nov 2012 22:44:15 +0800
> From: liunian at zju.edu.cn
> To: robocup-small at cc.gatech.edu
> Subject: [robocup-small] the rule of "Two defender in defence area"
> 
> Hi everybody,
> 
>      Maybe everybody in Mexico has a very deep impression on the law
> of "Two defender in  defence area". There were 3 penalties in the
> Quarterfinals Skuba vs Immortals due to this law.
>     Law 12 of  rule 2012 give the detial definition: is the second
> defending robot to simultaneously occupy the team's defence area in
> such a way tosubstantially affect game play.  But the rule did not
> give a clear definition of "substantially affect game play", is all up
> to the referee. So the problem is comming, i remembered that maybe
> more than 50% argument during the game are related to this law.
>       In real soccer game, there has not limitaion of the number of
> defenders in defence area, but only allow the Goal keeper can handle
> the ball, if the other player touch the ball with hand, he will
> receive a read card and the team will receive a penalty.
>       We can learn from this real soccer rule. All the robot can enter
> it's own defence area, but only the goal keeper can touch the ball, if
> the other robot touch the ball, the team will receive a read card and
> a penalty.
> 
>          Best regards.
> 
>                                                Yonghai Wu
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