Chess Knight Move

A guy comes home completely drunk one night. He lurches through the
door and is met by his scowling wife, who is most definitely not happy.
"Where the hell have you been all night?" she demands.
"At this new bar," he says. "The Golden Saloon. Everything there is golden.
It's got huge golden doors, a golden floor and even the urinal's gold!"
The wife still doesn't believe his story, and the next day checks the
phone book, finding a place across town called the Golden Saloon.
She calls up the place to check her husband's story.
"Is this the Golden Saloon?" she asks when the bartender answers the
phone.
"Yes it is," bartender answers.
"Do you have huge golden doors?"
"Sure do." "Do you have golden floors?"
"Most certainly do."
"What about golden urinals?"
There's a long pause, then the woman hears the bartender yelling,

"Hey, Duke, I think I got a lead on the guy that pissed in your saxophone last night!"