Five Queens

  1. Place five queens on a chessboard, such that every square including those occupied by the queens is under attack.
  2. Place five queens on a chessboard, such that every square EXCEPT those occupied by the queens is under attack.
  3. Find the smallest number of queens needed to attack every square on the board in the above two conditions for square boards from 2x2 to 7x7.
Source: rec.puzzles.
Solution
Mail to Ken