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Robots will attempt to place red and blue game tetras (colored to match the two alliance colors) in or on one or more of the nine goals to both score points and claim "ownership" of goals with their colored tetras. Ownership is claimed:

• By the physically higher tetra color on a goal or , if no tetras are on top
• By the physically higher tetra color in the base of the goal or , if no stacks are in the base
• By the alliance with more tetras in the base.

Tetras in goals score 1 point and tetras on goals score 3 points. A row or diagonal of the same color scores 10 points. Getting all of an alliance's robots back in their end zone at the conclusion of the match scores 10 points

Each 2-1/4 minute match will feature two (2) three-team alliances playing from opposite ends of the field. The robots from each alliance will be placed on starting positions in front of the driver stations (one at the tip of the center goal in an alliance's end zone and one to each side of the center goal and touching the driver station wall).

The robots will have a 15-second autonomous period (no driver control) at the start of a match to knock down and score hanging tetras and/or to use their starting tetras and/or gather tetras from the loading platforms and/or to locate "vision" tetras (specially marked for identification by the vision system) to score points and claim goals. Vision tetras scored on any of the 3-midfield goals will yield 1 or 2 bonus tetras added to the corner goals in their end zone.

After the Autonomous Period, the robots will be under driver control for the remaining 2 minutes of the match. Drivers from each alliance will be able to acquire additional tetra game pieces from four (4) locations, two (2) of which are attended by their human player (tetras will be placed on their robots) and two (2) of which are unattended (robots pick up tetras from loading platforms), and continue to score and claim goals. Before the end of the match, alliance robots will speed back to their end zones to top off their scores.

This year's game will certainly challenge teams with the vision system, the "new" tetra shape, working as a three-team alliance, and strategizing on claiming goals.

Source: 2005 FIRST Robotics Game Manual