In chess, queens can move horizontally, vertically, or diagonally, as far as they like, as shown in the picture. We say that a queen can "attack" another piece if it can move into the other piece on the next move. How can you place 8 queens on a chessboard such that none of the queens can attack each other?
May 28, 2015
May 9, 2015
May 2, 2015
Which Clock is Better ?
Which clock works better?
The one that loses a minute a day or the one that doesn't work at all?
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