2016 IRI - Rule Changes and Reasoning

[Chris Fultz]

Below are the 2016 IRI Rule Changes / Modifications. The goals of the changes was to minimize the impact on robot designed from any changes, assure a rapid flow of matches, increase the challenge for teams and adjust a few areas.

We are posting this now so that teams are aware before confirming their attendance at the 2016 IRI.

1. 3.1.4 Tower Strength = 12 for all matches.

2. 5.5.10 - In QUALIFICATIONS - Defenses will be randomly selected / placed per the details below. The placement will be defined in advance and will change every 10-12 matches to match the robot cycles. There will be no Audience Selection of Defenses.
A. Cheval de Frise
B. Ramparts or Moat
C. Sally Port
D. Rough Terrain or Rock Wall
E. Low Bar (Always in play and in position 1.)

3. 5.5.10 - In ELIMINATIONS - Defenses will be selected by the opposing alliance (Category and Placement, except Low Bar) per the categories below. There will be no Audience Selection of Defenses.
A. Cheval de Frise
B. Ramparts or Moat
C. Sally Port
D. Rough Terrain or Rock Wall

4. G21 Revision - A ROBOT contacting carpet in the opponent’s SECRET PASSAGE may not contact opposing ROBOTS who are in contact with the carpet in the SECRET PASSAGE, regardless of who initiates the contact.

5. G38 Clarification - Driving over or getting stuck on a boulder while holding another bolder will not be a violation of G38.

6. 3.1.3 No change to defense crossings for RP.

7. R5 A +5 pound weight allowance is provided. There is no formal inspection, however if a referee questions a robot weight it will be verified.

8. 5.4.1 - Draft Order 1-8, 1-8, 8-1. Alliances select their own backup. No requirement for any robot on an alliance to play.

9. G13 Exception – G13 Applies, however, AFTER a robot has fully crossed a defense and returned to the midline, a robot may cross the midline with no foul and contact with an opposing alliance robot will not be an additional foul.

10. 5.4.4 - In Eliminations, up to THREE tied MATCH SCORES between two alliances will be re-played. If the 4th re-play results in an additional tied MATCH SCORE, the published FIRST tie-breakers will be used.

[Chris Fultz]

REASONING -

1. Reflect the expected level of play and increase the challenge of receiving the RP.

2. The community has settled on these selections a high percentage of the time. This change reduces the field reset crew work. This change enables a 6 minute cycle time to provide 9 matches per team. Each team will play each set-up one time before they change (except where a cycle is split).Many teams will have limited scouting crews. The Portcullis has been removed by FIRST. The drawbridge was ignored by most teams.

3. This adds to the strategy options for eliminations and minimizes the changes to the original game play.

4. This removes the incentive to just go touch an opposing robot.

5. Getting stuck is enough of a penalty to pay.

6. Changes in number of crossings or number of defenses we too much impact on the original game and robots designed to play it.

7. This allows for repairs or new systems, while maintaining a safe robot weight limit.

8. Well, we always do this.

9. This encourages teams to develop / try a 2 boulder AUTON or return to mid-field without fear of major fouls.

10. This allows teams to play for the win, but also sets a limit for "how many times"

[bdaroz]

Originally Posted by Chris Fultz

10. 5.4.4 - In Eliminations, up to THREE tied MATCH SCORES between two alliances will be re-played. If the 4th re-play results in an additional tied MATCH SCORE, the published FIRST tie-breakers will be used.

I read this twice but this might warrant a confirmation/clarification...

You mean this to say: "... the published FRC tie-breakers will be used on the 4th re-play" as opposed to "... the published FIRST match tie-breakers will be used."

Yeah, I'm probably lawyering this a bit, but in case anyone else read it the way I did....

[ATannahill]

Originally Posted by bdaroz

I read this twice but this might warrant a confirmation/clarification...

You mean this to say: "... the published FRC tie-breakers will be used on the 4th re-play" as opposed to "... the published FIRST match tie-breakers will be used."

Yeah, I'm probably lawyering this a bit, but in case anyone else read it the way I did....

I think it is correct because the first three tied matches are mention in the first sentence. The second sentence only mentions one match for the tie-breakers to be used in.

I can see how it might require a second read to be clear.

[Chris Fultz]

If three matches end in a tie match score, we will play one more match.

If that one also ends in a tie match score, then we will go to the published tiebreakers to determine the winner.

There are some many potential implementations of this that we will publish a list of "if this happens ..." so it is clear before that happens.

[AllenGregoryIV]

I forgot the +5lb rule for TRI, I'll have to update it.

[Jack S.]

The G13 Exception is interesting, we could see some deviation from the "standard" 2-ball routines that have so far been shown. It should also make non-low bar 2 ball routines more common. Smart way of encouraging more auto play IMO.

[XaulZan11]

Originally Posted by Jack S.

The G13 Exception is interesting, we could see some deviation from the "standard" 2-ball routines that have so far been shown. It should also make non-low bar 2 ball routines more common. Smart way of encouraging more auto play IMO.

Wonder if it result in fewer successful 2 ball autos though, given how easy it will be to defend them.

[GKrotkov]

I have to say, I'm sad to see the drawbridge go. I entirely understand the portcullis, and I can see why IRI did away with the drawbridge. I did really love the extra strategic element that the drawbridge brought when a team that understood how to use it played it well. Messing with vision and pulling it off is an exciting nuance that Stronghold really benefitted from.

On that note, why is the rough terrain still around? At events I went to the rough terrain only a bit more used than the drawbridge (if that). If the drawbridge is going because it was unused, why not the rough terrain?

Perhaps I misinterpreting what Mr. Fultz said: "the drawbridge was ignored by most teams"? I thought that it meant that teams didn't select it much, but I could see how it could mean that teams didn't cross it much.

[Billfred]

Originally Posted by Chris Fultz

2. 5.5.10 - In QUALIFICATIONS - Defenses will be randomly selected / placed per the details below. The placement will be defined in advance and will change every 10-12 matches to match the robot cycles. There will be no Audience Selection of Defenses.
A. Cheval de Frise
B. Ramparts or Moat
C. Sally Port
D. Rough Terrain or Rock Wall
E. Low Bar (Always in play and in position 1.)

3. 5.5.10 - In ELIMINATIONS - Defenses will be selected by the opposing alliance (Category and Placement, except Low Bar) per the categories below. There will be no Audience Selection of Defenses.
A. Cheval de Frise
B. Ramparts or Moat
C. Sally Port
D. Rough Terrain or Rock Wall

What happens when the teams decide to go full Palmetto* and break all the available copies of the Cheval de Frise?

*Contrary to popular memes, you should always go full Palmetto.

[Richard Wallace]

Originally Posted by Billfred

What happens when the teams decide to go full Palmetto* and break all the available copies of the Cheval de Frise?

*Contrary to popular memes, you should always go full Palmetto.

Sometime after Week 0.5, many teams improved their CDF autons. Now most of them are considerably more effective than simple "ramming speed".

[ratdude747]

Originally Posted by Billfred

What happens when the teams decide to go full Palmetto* and break all the available copies of the Cheval de Frise?

*Contrary to popular memes, you should always go full Palmetto.

Since then they've made them beeifer. I know the first change was swapping from countersunk to counterboared panels. There may have been a second change. Knock on virtual wood, but in Indiana (and on Carson field for that matter) I don't remember any breaking (and the defunct countersunk ones being used as doorstops).

[Edxu]

Originally Posted by GKrotkov

I have to say, I'm sad to see the drawbridge go. I entirely understand the portcullis, and I can see why IRI did away with the drawbridge. I did really love the extra strategic element that the drawbridge brought when a team that understood how to use it played it well. Messing with vision and pulling it off is an exciting nuance that Stronghold really benefitted from.

On that note, why is the rough terrain still around? At events I went to the rough terrain only a bit more used than the drawbridge (if that). If the drawbridge is going because it was unused, why not the rough terrain?

Perhaps I misinterpreting what Mr. Fultz said: "the drawbridge was ignored by most teams"? I thought that it meant that teams didn't select it much, but I could see how it could mean that teams didn't cross it much.

I'm sure that the IRI committee put a lot of time into this decision. While it does negatively affect a few teams who planned for their robots to manipulate the drawbridge, I'm sure that the decision was made in the interest of the competitiveness of IRI itself.

While the Drawbridge may not look as obstructive from the stands, in many scenarios the Drawbridge is actually more detrimental to your OWN alliance than it is for the opposing alliance, as placing it in position 2 blocks your left-side member from seeing the left side goal, placing it in 3 blocks your own view of the middle goal, placing it in 4 blocks part of the right side goal and placing it in 5 entirely blocks view of the right-side goal from the right driver station.

Also the main difference between the Drawbridge and the Rough Terrain imo is that very few teams could justify putting a drawbridge anywhere on the field that would benefit their own alliance, while basically every team was able to cross the Rough Terrain.

[Chris is me]

Originally Posted by Edxu

I'm sure that the IRI committee put a lot of time into this decision. While it does negatively affect a few teams who planned for their robots to manipulate the drawbridge, I'm sure that the decision was made in the interest of the competitiveness of IRI itself.

While the Drawbridge may not look as obstructive from the stands, in many scenarios the Drawbridge is actually more detrimental to your OWN alliance than it is for the opposing alliance, as placing it in position 2 blocks your left-side member from seeing the left side goal, placing it in 3 blocks your own view of the middle goal, placing it in 4 blocks part of the right side goal and placing it in 5 entirely blocks view of the right-side goal from the right driver station.

Also the main difference between the Drawbridge and the Rough Terrain imo is that very few teams could justify putting a drawbridge anywhere on the field that would benefit their own alliance, while basically every team was able to cross the Rough Terrain.

To be quite honest, the only people I've ever heard say the Drawbridge adds to the depth and excitement of the game are people who have never had to play a match behind one. The drawbridge was a suicide pact - you torched your own visibility on a prayer that it messed up the opponent's visibility more. But it's closer to you than them, so it blocks more of your vision, and it blocks a significant chunk of the midfield. This is a good change.

[Billfred]

Originally Posted by Richard Wallace

Sometime after Week 0.5, many teams improved their CDF autons. Now most of them are considerably more effective than simple "ramming speed".

Originally Posted by ratdude747

Since then they've made them beeifer. I know the first change was swapping from countersunk to counterboared panels. There may have been a second change. Knock on virtual wood, but in Indiana (and on Carson field for that matter) I don't remember any breaking (and the defunct countersunk ones being used as doorstops).

They did identify the root cause of much of the Palmetto breakage, but that doesn't mean breakages didn't happen later in the season. And when your alternative is gone, I figure it's worth asking.