The Checkerboard

<p>A single diagonal step on a map sparks a legal war with huge consequences.</p> <p><p>Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early.&nbsp;<br><br>Start a free trial now on Apple Podcasts or by visiting <a href="http://siriusxm.com/podcastsplus." target="_blank">siriusxm.com/podcastsplus</a>.&nbsp;</p></p><br/> <p>Hosted by Simplecast, an AdsWizz company. See <a href="https://pcm.adswizz.com">pcm.adswizz.com</a> for information about our collection and use of personal data for advertising.</p>