Programmer and puzzlemaker Alex Boisvert distributed a puzzle packet at Crosswords LA to promote his Crossword Nexus solving app. The packet included the Hopscotch puzzle linked above. Also in the packet was a Marching Bands puzzle by Brendan Emmett Quiggley which he posted on his site.
The tournament crossword puzzles featured at Crosswords LA are available for sale on Alex’s site here. The proceeds benefit Reading to Kids, the organization that Crosswords LA has worked with since its inception. Check out the blog Box Relatives to read Alex Boisvert’s thoughts on computer-based approaches to puzzle construction and solving.