Thanks for the idea, Gina!

Allow the linking of two boards. First, they need to be made into ender boards, which can be done by crafting the table with an ender pearl. Then if you right-click a board on an ender board block in the world will link the two boards. When placed, any move played on one board will be played on the other board, and all state will be synched.

We may need to load the other chunk and mark it dirty so it gets saved, but not sure.