One followup - for 10 at the arrows, does that mean the center of the 10th board, or the crack between the 10th and 11th board?

On the approach, would 6.5 be the middle of the 7th board, or would 7 be the middle of the 7th board?

10th board would be the center of the 10th board.
6.5th board would be the crack between the 6th and 7th board.
7th board would be the middle of the 7th board.

EDIT: This was in response to Sk8's question to me.

I don't think the pattern - 31 figures make anything more valid as far as achieving a 6* entry angle. I think his original PDF is useful if you want to figure out how to target the points he has as targets. I just don't see how choosing those targets is beneficial.

When you choose targets at the end of the pattern using pattern - 31, you're using points that Slowinski and Neil Stremmel determined work as good exit points from patterns, no matter the style of bowler. Their research said that if that's where you exit the pattern, no matter the angle, you will create the most margin for error.

Will they be exact for everyone on every pattern? No. But it's going to give someone who hasn't been able to wrap their head around where they should be standing and where they should be targeting an idea of where those points should be instead of just guessing wildly about how to get the ball to the 9th board at 40 feet.

So the chart is "how" to get the ball to those points. There's no difference in how valid that is between the two. The difference is in "why" you'd want to target those points.

Ok, I was just curious as to why one was considered "valid" and the other was considered "invalid". Thanks for the answer, I understand what you are saying.