4 Wins board Game

I have added several options in the profile.
One lower part with snap-in base and one without, the snap-in base is on a different platform.
As well as the playing field once for printing with support (is difficult to remove the support) and a split for gluing without support, the pictures show the split version.

Aim of the game
In Four Wins, each player tries to place four pieces of their colour (red or yellow) in a row - vertically, horizontally or diagonally. ‘Four wins (tetris)’ is a variant that basically follows the same rules, except for one small difference, which is explained below.

The course of the game
The board consists of eight rows and eight columns. You start with an empty board and fill one square with each move.

The yellow player starts and places a piece in the first row, choosing any column (from a to h). After placing, the player must confirm his move.The piece is always placed on an empty square, under which there is no other empty square.

Tactics
It is best to set up two threats at the same time, each with three pieces in a row. As soon as a row of three pieces is built up, the opponent must react and then the other row is completed.

Of course, it is occasionally possible to profit from your opponent's mistakes. Although these will rarely occur, especially with experienced players, here is an example:

There is still no way for either side to force a win here. Let's assume, however, that yellow plays a1. Now red can place on a2 and immediately forces yellow to place on b3. It is then possible for red to complete a row of four on b4. So check every move to see if your opponent has made a mistake.