She made her lonesome way across the domain of King Coyote, visiting one 
castle after another, and encountering a different conundrum in each one. The 
second castle (after Castle Turing) was built on the slope of a mountain and 
had an elaborate irrigation system in which water from a bubbling spring was 
routed through a system of gates. There were many thousands of these gates, and 
they were connected to each other in small groups, so that one gate's opening 
or closing would, in some way, affect that of the others in its group. This 
castle grew its own food and was suffering a terrible famine because the 
arrangement of gates had in some way become fubared. A dark, mysterious knight 
had come to visit the place and apparently sneaked out of his bedroom in the 
middle of the night and fiddled with connections between some gates in such a 
way that water no longer flowed to the fields. Then he had disappeared, leaving 
behind a note stating that he would fix the problem in exchange for a large 
ransom in gold and jewels.