[Jake (The Snake)]

[ QUOTE ]
I can't remember, but I think a BDS is 1 out. We may be splitting or "splitting by three" (is there a word for that?) the straight though, so I'd give us something like 0.65 for it rather than 1.

[/ QUOTE ]

I think one misconception a lot of people have is that all backdoor straights are created equal (not saying you do David, just trying to point something out).

A quick way for doing backdoor straight estimates is figuring out how many outs give you how many outs.

Here, for example, we have:

4 Kings give us 8 outs
4 Aces give us 4 outs
4 8's give us 4 outs
4 9's give us 8 outs

Then multiply them together and divide by 47 to give us a very close approximation. 32+16+16+32 = 96/47 = 2.04 backdoor straight outs.

Then you can reduce from there for splits, reverse implied odds, etc.

I think .65 is too low, I'd guess about twice that.