Tetrad board game

This game can be played with the same rules as [Quarto](https://en.wikipedia.org/wiki/Quarto_(board_game)), but the pieces have a different shape.

Print two sets of 8 pieces in different colors. Highly customizable design. No supports needed.

**Rules:**
* There are two players.
* There are four piece characteristics: color, shape, height and filling.
* Take turns placing pieces on the board hoping to make a horizontal, vertical or diagonal row of four pieces with the same characteristic (e.g., four tall pieces). But...
* Before each player places a piece on the board, the *other* player chooses which unplaced piece is to be placed. So, each turn, one player chooses an unplaced piece and the other player places it, and then they switch.
* Pieces may not be removed once placed.

An alternate rule allows one also to win by putting a two-by-two square of matching pieces.

**Updates:**

* Dec 28, 2017: Made box shorter to save plastic
* Nov 20, 2017: Added box