Show Answer (added 2006-08-09)
Addendum (2006-08-04): This puzzle appeared one week before the 2006 US Puzzle Championship. Nick Baxter decided then, as a shout-out, to add a Distance puzzle to the USPC at the last minute.
Wei-Hwa's Puzzle Module for June 9th, 2006
Show Answer (added 2006-08-09)
Addendum (2006-08-04): This puzzle appeared one week before the 2006 US Puzzle Championship. Nick Baxter decided then, as a shout-out, to add a Distance puzzle to the USPC at the last minute.