The Game is Nirtz

The Game is Nirtz is a 1961 uncredited game, published by Ideal.

The game is played on a 8x8 board,

 

and each player has 10 pieces, marked 1 to 5 (each player has two of each).

This is a 7 in-a-row game (!) where pieces are not placed but moved. The number label determines the piece's moving range.

Here are the official rules: 

Besides the seven in-a-row requirement, the row must be orthogonal to the piece's initial setup (so, no diagonals also). The designer must have felt that leaving the direction to be decided would make the goal too easy to achieve. On first glance, it does not seem so, since making a seven in-a-row, especially on such a small board, is usually very hard if not impossible. 

However, the winning pattern can use the opponent's pieces, which is a quite original take on this genre. Also, the largest pieces are very flexible, since they can zig-zag while moving.