Rack 'n Roll was the game for the 2007

FIRST Robotics Competition FIRST Robotics Competition (FRC) is an international high school robotics competition operated by ''FIRST''®. Each year, teams of high school students, coaches, and mentors work to build robots capable of competing in that year's game. Robots c ...

season, announced on January 6, 2007. In it, two alliances of three teams each competed to arrange ring-shaped game pieces on a central arena element known as 'The Rack'.

Robots

Classes

Robots fall under three different classes restricting their maximum weight and height. These classes are:

Other restrictions

Robots also must have a maximum starting footprint of 28" x 38" regardless of class. Robots may expand once the match has begun. The game manual includes other rules restricting various aspects of the construction of the robot that have been put in place for the purpose of safety and fairness.

Field

The Rack 'n Roll field is dominated by 'The Rack', a large

metal A metal () is a material that, when polished or fractured, shows a lustrous appearance, and conducts electrical resistivity and conductivity, electricity and thermal conductivity, heat relatively well. These properties are all associated wit ...

contraption with three levels of hanging metal bars, with each level having 8 arms evenly spaced in an

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al manner. Each arm (known as a 'spider leg') has space for two

game A game is a structured type of play usually undertaken for entertainment or fun, and sometimes used as an educational tool. Many games are also considered to be work (such as professional players of spectator sports or video games) or art ...

pieces. Any more pieces placed on a spider leg beyond the first two are ignored for scoring purposes. At the beginning of the match, the rack is arbitrarily

translated Translation is the communication of the meaning of a source-language text by means of an equivalent target-language text. The English language draws a terminological distinction (which does not exist in every language) between ''transla ...

or rotated within three

feet The foot (: feet) is an anatomical structure found in many vertebrates. It is the terminal portion of a limb which bears weight and allows locomotion. In many animals with feet, the foot is an organ at the terminal part of the leg made up of ...

of the center of the field in order to give some

randomness In common usage, randomness is the apparent or actual lack of definite pattern or predictability in information. A random sequence of events, symbols or steps often has no order and does not follow an intelligible pattern or combination. ...

and to encourage

autonomous In developmental psychology and moral, political, and bioethical philosophy, autonomy is the capacity to make an informed, uncoerced decision. Autonomous organizations or institutions are independent or self-governing. Autonomy can also be defi ...

modes that do not depend on dead-reckoning. At the top of the Rack are four green-colored lights above the 1, 3, 5, and 7 legs to aid in autonomous-mode tracking.

Game pieces

The game pieces in Rack 'n Roll are inflatable toroidal

pool Pool may refer to: Bodies of water * Swimming pool, usually an artificial structure containing a large body of water intended for swimming * Reflecting pool, a shallow pool designed to reflect a structure and its surroundings * Tide pool, a roc ...

toys. There are 3 styles: Keepers, Ringers, and Spoilers. Keepers are tubes with lettering that are placed only during autonomous mode and, once placed, override any pieces placed later for scoring purposes. Ringers are undecorated tubes that are delivered onto the field either by

human Humans (''Homo sapiens'') or modern humans are the most common and widespread species of primate, and the last surviving species of the genus ''Homo''. They are Hominidae, great apes characterized by their Prehistory of nakedness and clothing ...

players via chutes, or are picked from the floor. Nine ringers of each color start on the field in the opposing team's start area (so the 9 blue ringers are in the red alliance's end zone, and vice versa). The other nine start behind the end wall, to be given out by human players. Spoilers are colored black, and cause the spider arm holding them to be ignored for scoring purposes. Spoilers can be removed or repositioned on the rack by robots multiple times. Each alliance starts with two spoilers, accessible by their human players.

Game play

Each match of Rack 'n Roll is 2 minutes 15 seconds long, divided into three segments. The first segment is a 15

second The second (symbol: s) is a unit of time derived from the division of the day first into 24 hours, then to 60 minutes, and finally to 60 seconds each (24 × 60 × 60 = 86400). The current and formal definition in the International System of U ...

autonomous period, where robots may attempt to place keepers onto the rack without human input. Once autonomous mode is complete, any keepers not already on the rack are no longer valid for scoring. The second segment, the teleoperated mode, is 2 minutes long, during which robots are operated by the drivers and may roam anywhere on the field. In the final 15 seconds, the end game, robots may not enter their opponent's end zone, but all other rules remain the same from the teleoperated period. Though the head referee may pause the game between the autonomous period and the teleoperated period, the end game follows directly after the teleoperated period.

Scoring

Rack scoring

The primary method of

scoring SCORE may refer to: *SCORE (software), a music scorewriter program * SCORE (television), a weekend sports service of the defunct Financial News Network *SCORE! Educational Centers *SCORE International, an offroad racing organization *Sarawak Corrido ...

in Rack 'n Roll is by making rows and

columns A column or pillar in architecture and structural engineering is a structural element that transmits, through compression, the weight of the structure above to other structural elements below. In other words, a column is a compression member ...

of tubes on the rack. A row or column of ''n'' tubes is worth 2ⁿ points to a maximum of n=8. Note that this includes rows or columns of length 1, so a single tube on the rack that does not form a row or column is worth 2 points. Teams have access to 21 scorable keepers and ringers. This means that the maximum possible score from the rack should be 596 . That is, two rows of 8 ringers, a row of 5 (2 ringers plus 3 keepers), 5 vertical columns of length 3, then 3 vertical columns of length 2.

Robot scoring

As is usual in a FIRST game, robot positions at the end of the match are worth bonus points. In Rack n' Roll, each robot in its alliance end zone that is not touching any field element and has its lowest part 4 or more inches off the ground will score 15 bonus points. A robot that is not touching any field element and has its lowest part 12 or more inches off the ground will score 30 bonus points. Since robots may not be touching any field element, this means that in order to score bonus points, teams will have to depend on their alliance partners to provide mechanisms to lift their robots or will have to have mechanisms to lift their alliance partner's robots. Since at least one robot must be touching the ground in order to lift the other two alliance robots off the ground, the maximum conceivable bonus points an alliance can score is 60 points.

Kit of parts

The kit of parts included a few new items, including a new battery and the new EasyC Pro. One substantial rule change is that batteries from previous competitions are not legal, a change that can be easily enforced since the 2007 batteries are visually different from earlier batteries.

Notable events

In the first week of regionals, a bug in the match scheduling system caused many teams to face one other team in all or almost all of their matches.

Competition season

Regional events

The following regional events were held in 2007: * Arizona Regional - Phoenix * BAE Systems Granite State Regional - Manchester, NH * Bayou Regional - New Orleans * Boilermaker Regional - West Lafayette, IN * Boston Regional - Boston * Brazil Pilot - Porto Alegre, Brazil (pilot) * Buckeye Regional - Cleveland, OH * Chesapeake Regional - Annapolis, MD * Colorado Regional - Denver * Davis Sacramento Regional - Davis, CA * Detroit Regional - Detroit * Finger Lakes Regional - Rochester, NY * Florida Regional - Orlando * GM/Technion Israel Regional -

Tel Aviv Tel Aviv-Yafo ( or , ; ), sometimes rendered as Tel Aviv-Jaffa, and usually referred to as just Tel Aviv, is the most populous city in the Gush Dan metropolitan area of Israel. Located on the Israeli Mediterranean coastline and with a popula ...

, Israel * Great Lakes Regional - Ypsilanti, MI * Greater Kansas City Regional - Kansas City, MO * Greater Toronto Regional - Mississauga, ON * Las Vegas Regional - Las Vegas * Lone Star Regional - Houston * Midwest Regional - Chicago * NASA/VCU Regional - Richmond, VA * New Jersey Regional - Trenton, NJ * New York City Regional - New York City * Pacific Northwest Regional - Portland * Palmetto Regional - Columbia, SC * Peachtree Regional - Duluth, GA * Philadelphia Regional - Philadelphia * Pittsburgh Regional - Pittsburgh * St. Louis Regional - St. Charles, MO * San Diego Regional - San Diego * SBPLI Long Island Regional - Hempstead, NY * Silicon Valley Regional - San Jose, CA * Southern California Regional - Los Angeles * UTC Connecticut Regional - Hartford, CT * Waterloo Regional - Waterloo, ON * West Michigan Regional - Allendale, MI * Wisconsin Regional - Milwaukee

Final round on Einstein

The championship was held in the Georgia Dome, Atlanta. Source:

References

External links

Official Rack N' Roll animation2007 Game ManualVideo archive of most matches from 2007 regionalsFlash Format archive of many match Videos from 2007 regionals and The ChampionshipChief Delphi
has current topics on the 2007 game and the past games of the FIRST competitions {{FIRST 2007 in robotics FIRST Robotics Competition games