Forward, Backward and Interleaved Chaining

• Imagine the case where you have a current state and a goal state.
• From the current state, and subsequent states there are only a few ways to proceed. However, there are a lot of different primitives that allow you to fulfill the goal.
• How do you reason? A good way is to forward chain; that is explore (search) from the current state.
• If on the other hand there are a lot of options from the current state, and few ways of achieving the goal, you backward chain.
• You can also interleave these two methods to reduce the number of states you explore.