public bool isMatched = false;

//........//

void CheckMatches()
    {
        //Check horizontal matching
        if (column > 0 && column < _grid.gridSizeX -1)
        {
            //Check samping kiri dan kanan nya
            GameObject leftTile = _grid.tiles[column - 1, row];
            GameObject rightTile = _grid.tiles[column + 1, row];
            if(leftTile != null && rightTile != null)
            {
                if (leftTile.CompareTag(gameObject.tag) && rightTile.CompareTag(gameObject.tag))
                {
                    isMathced = true;
                    rightTile.GetComponent<Tile>().isMathced = true;
                    leftTile.GetComponent<Tile>().isMathced = true;
                }
            }
        }
        //Check vertical matching
        if (row > 0 && row < _grid.gridSizeY - 1)
        {
            Check samping atas dan bawahnya
            GameObject upTile = _grid.tiles[column, row + 1];
            GameObject downTile = _grid.tiles[column, row -1];
            if (upTile != null && downTile != null)
            {
                if (upTile.CompareTag(gameObject.tag) && downTile.CompareTag(gameObject.tag))
                {
                    isMathced = true;
                    downTile.GetComponent<Tile>().isMathced = true;
                    upTile.GetComponent<Tile>().isMathced = true;
                }
            }
        }
    }