Ahmet and Betül play a game on $ n\times n$ $ \left(n\ge 7\right)$ board. Ahmet places his only piece on one of the $ n^{2}$ squares. Then Betül places her two pieces on two of the squares at the border of the board. If two squares have a common edge, we call them adjacent squares. When it is Ahmet's turn, Ahmet moves his piece either to one of the empty adjacent squares or to the out of the board if it is on one of the squares at the border of the board. When it is Betül's turn, she moves all her two pieces to the adjacent squares. If  Ahmet's piece is already on one of the two squares that Betül has just moved to, Betül attacks to his piece and wins the game. If Ahmet manages to go out of the board, he wins the game. If Ahmet begins to move, he guarantees to win the game putting his piece on one of  the $\dots$  squares at the beginning of the game.

$\textbf{(A)}\ 0 \qquad\textbf{(B)}\  n^{2} \qquad\textbf{(C)}\  \left(n\minus{}2\right)^{2} \qquad\textbf{(D)}\  4\left(n\minus{}1\right) \qquad\textbf{(E)}\  2n\minus{}1$
1. **Understanding the Board and Moves**:
   - The board is an \( n \times n \) grid where \( n \geq 7 \).
   - Ahmet has one piece, and Betül has two pieces.
   - Ahmet can move his piece to an adjacent square or out of the board if it is on the border.
   - Betül moves her two pieces to adjacent squares and wins if she moves to a square occupied by Ahmet.

2. **Ahmet's Winning Strategy**:
   - Ahmet wins if he moves his piece out of the board.
   - To guarantee a win, Ahmet should place his piece on a border square initially.

3. **Border Squares Calculation**:
   - The border squares are those on the perimeter of the \( n \times n \) board.
   - The total number of border squares can be calculated as follows:
     - There are \( n \) squares on each of the four sides.
     - However, the four corners are counted twice, so we subtract 4.
     - Therefore, the number of border squares is \( 4n - 4 \).

4. **Inner Squares Calculation**:
   - The inner squares are those not on the border.
   - The total number of squares on the board is \( n^2 \).
   - The number of inner squares is \( n^2 - (4n - 4) \).

5. **Safe Places for Ahmet**:
   - Ahmet can guarantee a win by placing his piece on any of the border squares.
   - The number of such safe places is \( 4(n - 1) \).

6. **Conclusion**:
   - The number of safe places for Ahmet to guarantee a win is \( 4(n - 1) \).

The final answer is \( \boxed{4(n-1)} \)