Here is a brute force solution to the fetch puzzle. Basically, at each step there are three possibilities :
- You can fill a bucket.
- You can transfer water from one bucket to the other one.
- You can dump out the water from a bucket.
In this brute force solution, I try each one of these steps and then try all three again after each one of the previous steps. And on and on until I get the required amount of water in one of the buckets.
Check it out. Source code is on my github repo - https://github.com/ashtewari/fetch