A	B	C	D	E
1
2
3
4
5

Consider a 5 by 5 Chess Board. Is it possible to place 5 Queens on the board such that three pawns can safely be placed on the board? (aka, by carefully choosing where to place the 5 queens, can you arrange it so that there are 3 squares on the board that none of the queens can attack)

(From - http://www.princeton.edu/~sjmiller/riddles/riddles.html)

Put the queens on squares:
A3, A4, B1, B4, C1

And so therefore put the pawns on:
E2, D5, E5

Posted by sarah on 2003-01-09 09:14:26