13. Billiard Inclined Bowl 
We have no variations registered - P

14. Billiard Square 
We have no variations registered - PP

15. Stand Up Billiard (Poker)
The origin of this name is probably due to its resemblance to a croquet mallet (as found in a few dictionaries); according to others it comes from the american card game Poker and the easiness of resting it on top of a table.
We have no variations registered- PP

16. Full Bent Billiard
Briar diversion inspired by the shape of the ceramic pipes originally defused in the Austro-Hungarian Empire.
We have no variations registered- NNP

17. Bent Dublin Full 
We have no variations registered variations of a group leader; up to 13 - NP

18. Bent Apple
We have 7 variations  registered - NP

19. Bent Pot
We have 2 variations registered - NP

20. Bent Bulldog
We have 3 variations registered - NP