\BOOKMARK [1][-]{section.1}{Introduction}{}% 1
\BOOKMARK [1][-]{section.2}{Notation and basic results}{}% 2
\BOOKMARK [1][-]{section.3}{Tiling 2n boards}{}% 3
\BOOKMARK [1][-]{section.4}{Tiling 3n boards}{}% 4
\BOOKMARK [1][-]{section.5}{Tiling m n boards}{}% 5
\BOOKMARK [1][-]{section.6}{Acknowledgments}{}% 6