Checkerboard 
To dream of a checkerboard implies that your character consists of many different and perhaps, complicated levels or attributes. You are a very complex and interesting person.
Booster Cables
Dreaming of booster cables symbolizes reviving something. Dreaming that you are attaching the booster cables to something represents your effort to revive something associated with that object. For instance, trying to revive your bed means you may be searching for a way to enhance your sex life.
Attaching booster cables to a person symbolizes your hopes or desires to revive that person either literally (generally when the person is sick or dead) or figuratively (such as reviving a relationship).
Using booster cables on your car in a dream is a general symbol of small issues and frustrations that are currently happening in your daily life.
Obstacle Course
To dream of an obstacle course may signify that the path you have chosen is not the best one for you. At the very least, you may be making things harder for yourself than is necessary.
To dream of an obstacle course is a gentle reminder to practice acceptance, as resistance can be pointless and painful.