ゴモクタイル (Gomoku tile)

This is a game of Five-in-a-Row in which five or more stones of the player's own color.
There are squares with an "X" on them, which are obstacles for both players.

The background of the tiles can be white or gray.
When placing a tile, the color of that square has to be checkered.
It is possible to be on the verge of a fifth square, but not be able to place it because of the tiles.

—description from the publisher