1 hook in from the back= more options than two?

[Draven]

[Res Judicata]

Gi or no gi? Because, at least with a gi, there are a ton of back/turtle attacks in Judo that aren't typically taught in BJJ. BJJ rules strongly favor and encourage getting two hooks before proceeding with further attacks, otherwise you're giving up 4 points. Judo doesn't care. For example, armbar entries are pretty straightforward when you have one hook.

[GoldenJonas]

There are also 10-15 or so different collar choke variations from a clock choke set up (that I know, I'm positive there are a ton more) to set-up from turtle with or without the hook in Gi. I'll try and get some video of them and the set-ups I use....err, was taught.

Have you also tried the various hook set-up options, i.e., spiral ride, base chop, choke dekes to open the elbows, etc.

Also, don't forget the various crucifix, reverse oma-plata, lapel wraps, and reverse triangle options that can be set-up from the single hook and/or turtle.

[Res Judicata]

Here's a good armbar series from one hook in the turtle, since that's the position you were asking about. Works with or without the gi.

[265lbsfist]

Just triangling your legs and seatbelting your arms and pull like crazy will be a spine lock. And if doesn't make them tap it might just open up the neck for a choke or the hip for a second hook.

Bit douchey to perform fast and hard in training but very effective.

[Res Judicata]

If you like triangles, there are many judo-style side and reverse triangle entries from the turtle. I can't directly link the video, but many of them are demonstrated starting at about 4:20 in the video linked here. They are skilled techniques, though.

http://aasejudo.wordpress.com/2010/02/28/sankaku-waza/

[jnp]

Missing post moved here: http://www.bullshido.net/forums/showthread.php?t=115757

[Res Judicata]

And, because I'm bored, this is probably my favorite turn over at the moment: bow and arrow choke from the turtle. The initial grip is the key part.