Challenge #1 – Relay Race• Robot #1 will be randomly placed

on starting line #1, #2 or #3.• Robot #1 will drive until it detects

the “Dark Line” - Robot #1 will transmit to Robot #2 that it has finished its leg of the race.

• Robot #2 will start once Robot #1 has reached the dark line and received a message.

• Robot #2 will follow the curved line until it hits the finish line wall.

3

2

1

Wall

Dark Line

Challenge #2 – Grid NavigationRules:• Robot #1 (Blue) will have a sonar

sensor and a light sensor.• Robot #2 (Green) will have a “claw”

and a light sensor.• Field will be a 5x10 9-inch spaced

“grid world” • Total board size is 45 inches by 93

inches (4x8 sheet with 1 ½ inches cut off each side – to fit in an FLL size game board)

• The location of the ball, wall and goals will vary between each run, but will always remain in the same “column” of the grid.

Challenge #2 – Grid Navigation

• Objective #1 – Detect the Wall– Robot #1 (Blue) will drive

forward and detect the wall.– Robot #1 should measure the

number of grid spaces to determine the location of the wall and transmit this information to Robot #2 (Green)

Challenge #2 – Grid Navigation

• Objective #2 – Drive to the Ball– Robot #2 (Green) will drive

forward and detect the ball.– The Red/Blue balls will be

from a standard NXT kit– The ball will on a 3 inch tall

PVC Pipe– Robot #2 should use the

information Robot #1 (Blue) sent to determine the distance.

Challenge #2 – Grid Navigation

• Objective #3 – Determine the color of the ball– Robot #2 (Green) will

determine the color of the ball (either blue or red) – this will be demonstrated by knocking the ball into the correct “Goal”.

– Each “run” will randomly have either a blue or red ball.

Challenge #2 – Grid Navigation

• Objective #4 – Defending the goal– Robot #1 (Blue) will drive into

the opposing colored goal (opposite of the color of the ball)

– To complete this, Robot #2 (Green) has to transmit the color of the ball that it found.