Four distinct works, their creation initiated by a shared prompt. Four choreographers, plus time, space, and the ten dedicated contemporary ballet artists of Amy Seiwert’s company, Imagery. An environment that prizes risk-taking over accomplishment. This is the formula taken up by Seiwert for her annual incubator project, Sketch, initiated in 2011 to foster innovation in ballet-based choreography. “We come here with permission to fail,” she has stated in interviews. That said, the four dance makers/risk takers for Sketch 13: Lucky, created a compelling and entertaining exploration that happens to also look quite accomplished. It’s a terrific send off for the project that Seiwert, recently named incoming artistic director for Smuin Ballet, has announced will be her last.