Chocolathon is the world's first chocolate hackathon. Build or pitch real solutions for Cocoa Dolce, a local chocolate maker, and compete for cash and chocolate prizes. The hackathon is 9 a.m. to 5 p.m. Saturday, Sept. 19 at Woolsey Hall at WSU. Teams of one to four are welcome, from every major and every skill level. Chocolathon is presented by the WSU AI Club in partnership with Cocoa Dolce, with sponsors Lovable and Jimmy John's, and the Barton School of Business at Wichita State University. Register at wichita.edu/chocolathon. Registration closes Thursday, Sept. 10.