Original: aired celebrity episodes and the International Tournament taped in Las Vegas, Nevada, and then was put permanently into use on the April 23, 2001 episode.
Simplified: When the show aired episodes in Las Vegas, Nevada in February 2001, an updated version of the 1997 was introduced, with a faster tempo and more upbeat feel. It was then put permanently into use from the April 23, 2001 episode onward.