White Grid: 6, 0, 9, 3|9, 0, 12, 3|12, 0, 15, 3|15, 0, 18, 3|18, 0, 21, 3|21, 0, 24, 3|24, 0, 27, 3|27, 0, 30, 3|30, 0, 33, 3|33, 0, 36, 3|36, 0, 39, 3|39, 0, 42, 3|45, 0, 48, 3|3, 3, 6, 6|18, 3, 21, 6|27, 3, 30, 6|18, 6, 21, 9|27, 6, 30, 9|45, 6, 48, 9