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Minimum number of queens required so that every square grid on chess board is under the attack of a queen?

+1 vote
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Imagine there are infinite number of Queens (Chess Game Piece) with u. Find the minimum number of queens required so that every square grid on the chess board is under the attack of a queen. Arrange this minimum no. of Queens on a chess board.

posted May 20, 2014 by Santosh Prasad

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3 Solutions

+1 vote

it requires much deep thinking then i was able to come up with two more solution that requires 5 queens & i think that are minimum number of queens we are looking for ...

1st (1,1) (3,4) (3,6) (4,2) (5,5)
2nd (0,0) (1,7) (2,4) (4,0), (7,6)

Queen Needed 5

solution May 23, 2014 by Satish Kumar Vadlavalli
0 votes

Eight queens.

solution Aug 27, 2015 by Ramana V Sista
0 votes

minimum no is 5 enter image description here

solution Oct 3, 2016 by Pk Jinjawadiya



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Once upon a time, in a castle far, far away, lived a queen. This queen's castle was located on one side of a great field. However, the king's castle was located on the other side. The queen didn't like the king, so she took her 2 horses and her army and attacked. There was a huge, epic, and bloody battle on the great field in which all the king's men were defeated and the king himself was captured. However, at the end of the battle, the killers and the killed, the victors and the victims, all laid down, side by side, in one big coffin.

What happened?

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