Divide the infinite chess-board into countries, where squares in the same country are connected by edges.
Suppose two countries are adjacent if they touch either along an edge or at a corner.
What is the version of the four-colour theorem for this?
2025-01-13 19:54:10.1736798050
Chessboard four-colour theorem
151 Views Asked by Empy2 https://math.techqa.club/user/empy2/detail AtRelated Questions in RECREATIONAL-MATHEMATICS
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