Using only half of a chess board you may place five queens anywhere. After you place them, I move each queen at most once with standard queen moves. If I make a horizontal five-in-a-row, I win. Can you beat me?

(In reply to What about... by e.g.)

Move a2 to b1 and h2 to g1

I believe you can't be beaten.  There must be at least one row with2 queens, call that the base row.  Move the other queens to that row either vertical or diagonal, with three queens thais ia always possible.  Before doing so, move the base row queens horizontally to free spaces if necessary.

 

Posted by Hugo on 2006-10-24 12:16:48