MathDB
domino tiling 9x9 board without two corners and center (VTRMC 2004 P4)

Source:

August 2, 2021
combinatoricsTiling

Problem Statement

A 9×99\times9 chess board has two squares from opposite corners and its central square removed. Is it possible to cover the remaining squares using dominoes, where each domino covers two adjacent squares? Justify your answer.