1st and 2nd Rounds.—Black.
3rd and 4th Rounds.—White.
5th and 6th Rounds.—Black.
7th and 8th Rounds.—Grey.
9th and 10th Rounds.—5 G, 3 B. Repeat.
11th and 12th Rounds.—6 G, * 1 B, 7 G. Repeat from *.
13th and 14th Rounds.—2 G, * 1 W, 7 G. Repeat from *.
15th and 16th Rounds.—1 G, * 3 W, 5 G. Repeat from *.
17th and 18th Rounds.—3 W, 4 G, Repeat.
19th and 20th Rounds.—2 W, * 4 B, 1 G, 3 W. Repeat from *.