ZBLL Recognition
Baum Harris (BH)
BH was proposed in 2007-2008 by Jason Baum and Dan Harris
NCP
No CP (NCP) was developed in November, 2021 by Ryan Hudgens (OreKehStrah)
Tran Style
Tran Style recognition was first mentioned in 2015 in a seminar by Chris Tran then detailed in February 2016.
Tran Style V2
TV2 was proposed by Ryan Hudgens (OreKehStrah) in September 2022
The first screenshot is from a private message between Ryan Hudgens and Joseph Tudor.
https://orecubingprojects.github.io./OreKehStrah's%20ZBLL%20Recognition%20Guide.html
Polar
Polar was documented in August 2023.
Although documented in 2023, the idea goes back to around 2010-2012 when NMLL, the MI2 method, and the second version of NMCLL recognition were developed. Polar is similar to Tran V2, which was published first, with the major difference being the CLL recognition system.
The first screenshot was a private message between Tim Mosher (tsmosher) and myself. The second is from the ZZ Discord server.
In September 2022 Ryan Hudgens (OreKehStrah) created a guide that describes the various ZBLL recognition systems