Calculating CMB / CMD for a black dragon - what am I missing?

[emeraldlich]

All right ... I've probably overlooking something very obvious, but ...

I started statting up a mature adult black dragon. To make sure I was doing the math right, I began statting an adult black dragon as well, just to see if I could match what's in the Bestiary. And that's when I ran into a problem.

For an adult black dragon, I came up with the following:

CMB: 22 (base attack 14, +7 from 25 Str, +1 for size)
CMD: 33 (10, +14 BAB, +7 from 25 Str, +1 from 12 Dex, +1 for size)

... but the Bestiary has:

CMB: 24
CMD: 33 (37 vs. trip)

The adult black dragon also has the following feats: Alertness, Improved Initiative, Improved Vital Strike, Power Attack, Skill Focus (Stealth), Vital Strike, Weapon Focus (bite). I'll be darned if I can see how any of them adjust CMB. (Also not sure where the +4 vs. trip comes from - Improved Initiative?)

It's got to be something obvious ... what am I missing???????

[donato]

Well, the bonus against trip at least, comes from the fact that it has four legs.

[Jiggy]

I don't know what size the dragon is, but perhaps you have the wrong size modifier?

[emeraldlich]

Jiggy wrote:

I don't know what size the dragon is, but perhaps you have the wrong size modifier?

Size is large, which gives a +1 modifier.

[emeraldlich]

donato wrote:

Well, the bonus against trip at least, comes from the fact that it has four legs.

Ah ha! Gracias, sir. Knew it had to be something simple - forgot that.