Pasha and Vova play the game crossing out the cells of the $3\times 101$ board by turns. At the start, the central cell is crossed out. By one move the player chooses the diagonal (there can be $1, 2$ or $3$ cells in the diagonal) and crosses out cells of this diagonal which are still uncrossed. At least one new cell must be crossed out by any player's move. Pasha begins, the one who can not make any move loses. Who has a winning strategy?
1. **Initial Setup and Game Rules:**
   - The game is played on a $3 \times 101$ board.
   - The central cell (which is the cell in the second row and 51st column) is initially crossed out.
   - Players take turns crossing out cells along diagonals.
   - A diagonal can have 1, 2, or 3 cells.
   - At least one new cell must be crossed out in each move.
   - Pasha starts the game, and the player who cannot make a move loses.

2. **Understanding the Board and Moves:**
   - The board has 3 rows and 101 columns.
   - The central cell is initially crossed out, so the game starts with one cell already crossed out.
   - Each move involves crossing out cells along a diagonal, which can be of length 1, 2, or 3.

3. **Analyzing the Game Dynamics:**
   - The game can be visualized as a series of moves where each player crosses out cells along diagonals.
   - The key is to determine the total number of moves and whether it is even or odd.
   - If the total number of moves is even, the second player (Vova) wins because Pasha starts the game.
   - If the total number of moves is odd, the first player (Pasha) wins.

4. **Counting the Total Number of Moves:**
   - The board has $3 \times 101 = 303$ cells.
   - One cell is initially crossed out, leaving $303 - 1 = 302$ cells to be crossed out.
   - Each move crosses out at least one cell, so the total number of moves required to cross out all remaining cells is 302.

5. **Determining the Winner:**
   - Since 302 is an even number, the total number of moves is even.
   - Therefore, the second player (Vova) will make the last move, and Pasha will be unable to make a move after that.

Conclusion:
\[
\boxed{\text{Vova has a winning strategy.}}
\]