Can you please help me find the name of this old dos/windows game from the late 80s/early 90s?

I've haven't seen it for over 20 years. Here's what I remember: Black screen. White grid. Flat. Take turns placing balls into the boxes in the grid. It's a strategy/board game. Winner is one who dominates the board. I remember that when you place the dot, it would take over the opponents pieces around it based on how they were laid out making them your own. Winner is the person who has dominated enough of the board. It was very basic. Each game would only take a minute or two. I used to play it in school on a windows 3.1 or windows 95 machine. It looked like a dos game but I can't find it anywhere. Thanks in advance!