What are the "21" flavors of Sam Adams?

Question

Their website lists 20....of which I've tried 13...what's the 21st?

These are the flavors I know:

1. Boston Lager

2. Sam Adams Light

3. Boston Ale

4. White Ale

5. Summer Ale

6. Winter Brew

7. Hefeweizen

8. Honey Porter

9. Irish Red

10. Black Lager

11. Pale Ale

12. Cherry Wheat

13. Cream Stout

14. Double Bock

15. October Fest

16. Old Fezzwig Ale

17. Cranberry Limbic

18. Holiday Porter

19. Scotch Ale

20. Brown Ale

21. ??????

Answer 1

Chocolate Bock - here it is.....

http://www.samueladams.com/world_of_beer...

Answer 2

Utopias

Answer 3

dont they have that pumpkin beer in october

Answer 4

Not sure where 21 comes from, but I don't see the Spring Ale, and the Imperial Pilsner is also missing.  I also read there's a Chocolate Bock, doesn't appear to be retired but who knows.  Clearly, this implies 23 Sam Adams...who also makes the Twisted Teas.