Maybe you should look into fixed- colour X-cross and CN- X-cross, my intuition tells me the numbers would be somewhat better (4 X-cross possabilities or 24 X-cross possabilities).
But then again, who does use X-cross every solve?
mvg
So, on topic. The document (on page 1) posted by miniGOINGS was about a ZZ reduction.
I've worked out an example solve for this. My strategy is as followed:
- centers
- line- dedges + as many as possible random dedges (most of the time 3 extra)
- Line + EO of the already made dedges (place these...