$stone_height = 10;
$stone_radius = 10;
$stone_clearance = 0.75;
$hoshi_radius = 3;
$goban_hole_radius = 1;
$goban_height = 18;
$line_depth = 2;
$cell_width = 22;
$cell_length = 23.7;
$goban_padding = 25;
$line_width = 1;
$goban_size = 19;
$hoshi_pos = [4, 10, 16]; // [4, 10, 16] for 19x19, [4, 7, 10] for 13x13