There are eight identical Black Queens in the first row of a chessboard and eight identical White Queens in the last row. The Queens move one at a time, horizontally, vertically or diagonally by any number of squares as long as no other Queens are in the way. Black and White Queens move alternately. What is the minimal number of moves required for interchanging the Black and White Queens?

[i](5 points)[/i]
To solve this problem, we need to find the minimal number of moves required to interchange the positions of the Black Queens in the first row and the White Queens in the last row on a chessboard. Let's break down the solution step by step.

1. **Initial Setup:**
   - The Black Queens are initially placed at positions \((1,1), (2,1), (3,1), \ldots, (8,1)\).
   - The White Queens are initially placed at positions \((1,8), (2,8), (3,8), \ldots, (8,8)\).

2. **Movement Constraints:**
   - Queens can move horizontally, vertically, or diagonally by any number of squares as long as no other Queens are in the way.
   - Black and White Queens move alternately.

3. **Strategy for Minimal Moves:**
   - We need to move each Black Queen to the corresponding position of a White Queen and vice versa.
   - We will consider moving the Queens in pairs to minimize the number of moves.

4. **Detailed Steps:**
   - Consider the rightmost two columns first:
     - Move the White Queen at \((8,8)\) to \((4,5)\).
     - Move the White Queen at \((7,8)\) to \((4,4)\).
     - Move the Black Queen at \((8,1)\) to \((8,8)\).
     - Move the Black Queen at \((7,1)\) to \((7,8)\).
     - Move the White Queen at \((4,5)\) to \((8,1)\).
     - Move the White Queen at \((4,4)\) to \((7,1)\).

   - Repeat the above steps for the next pair of columns:
     - Move the White Queen at \((6,8)\) to \((3,5)\).
     - Move the White Queen at \((5,8)\) to \((3,4)\).
     - Move the Black Queen at \((6,1)\) to \((6,8)\).
     - Move the Black Queen at \((5,1)\) to \((5,8)\).
     - Move the White Queen at \((3,5)\) to \((6,1)\).
     - Move the White Queen at \((3,4)\) to \((5,1)\).

   - Repeat the above steps for the next pair of columns:
     - Move the White Queen at \((4,8)\) to \((2,5)\).
     - Move the White Queen at \((3,8)\) to \((2,4)\).
     - Move the Black Queen at \((4,1)\) to \((4,8)\).
     - Move the Black Queen at \((3,1)\) to \((3,8)\).
     - Move the White Queen at \((2,5)\) to \((4,1)\).
     - Move the White Queen at \((2,4)\) to \((3,1)\).

   - Repeat the above steps for the last pair of columns:
     - Move the White Queen at \((2,8)\) to \((1,5)\).
     - Move the White Queen at \((1,8)\) to \((1,4)\).
     - Move the Black Queen at \((2,1)\) to \((2,8)\).
     - Move the Black Queen at \((1,1)\) to \((1,8)\).
     - Move the White Queen at \((1,5)\) to \((2,1)\).
     - Move the White Queen at \((1,4)\) to \((1,1)\).

5. **Counting the Moves:**
   - Each pair of columns requires 6 moves.
   - There are 4 pairs of columns.
   - Total moves required: \(4 \times 6 = 24\).

Therefore, the minimal number of moves required to interchange the Black and White Queens is \(24\).

The final answer is \(\boxed{24}\).