Seega

Take turns placing two tokens at a time onto empty squares, alternating with your opponent until every square but the center is filled.

The player who placed last skips a turn, and the other player moves first onto the empty center square.

On each turn afterward, slide one of your tokens horizontally or vertically into an adjacent empty square.

Capture an opponent's token by trapping it between two of your own tokens in a straight line, either horizontally or vertically.

Removed tokens are taken off the board immediately and cannot be replaced.

The game ends when one player has no tokens left or cannot move, and the other player is declared the winner.