K 0 chessboard of the deterioration can easily be covered, because it does not non-ramshackle box for coverage of the three grid plate number of 0.
k为0的残缺棋盘很容易被覆盖，因为它没有非残缺的方格，用于覆盖的三格板的数目为0。
K 0 chessboard of the deterioration can easily be covered, because it does not non-ramshackle box for coverage of the three grid plate number of 0.
k为0的残缺棋盘很容易被覆盖，因为它没有非残缺的方格，用于覆盖的三格板的数目为0。
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