Each player has three pieces. Take turns putting one on an empty point.
Three of yours on a drawn line wins: across, down, or either diagonal. That can happen while the pieces are still going down.
After all six pieces are on the board, slide one piece along a line to the next empty point. No jumping.
A player who cannot move loses. The same position three times is a draw.
Whoever starts can force a win by putting the first piece in the center and playing perfectly. An edge first loses to perfect play. A corner first draws. The computer plays that way. On one device, pass it. Online, the host chooses who starts.
Gamel