Two Rooks

pompom · 2011-04-13T19:10:59-07:00

Like the eight queens puzzle, you need to place 2 rooks on the board. But not just anywhere on the board. The rule is that both rooks may not attack the same square. How do you place 2 rooks on the board without having them both attacking the same square?

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joseph_ward

Feb 4, 2012

#21

11 is not possible; in fact, the numbers for which it cannot be done are 11, 13, 17, 19, 22, 23, 26, 27, 29, 31, 33, 34, 37-39, 41, 43-47, 50-55, and 57-63.