We have no meanings for "ordinary chessboard" in our records yet.
1 We cannot divide the ordinary chessboard into four equal square compartments, and describe a complete tour, or even path, in each compartment.
2 Place as few bishops as possible on an ordinary chessboard so that every square of the board shall be either occupied or attacked.
3 This equality, of course, is in consequence of the fact that the number of squares on an ordinary chessboard , sixty-four, is an even number.
4 I have not attempted the task of enumerating the ways of dividing a board 8x8-thatis, an ordinary chessboard .
5 On an ordinary chessboard , 8 by 8, every square can be guarded-thatis, either occupied or attacked-by5 queens, the fewest possible.
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