Here you’ll find the most comprehensive family tree of different ways to hold marcosticks, classified by their relatedness to the Standard Grip.
#FamilyTreeOfChopstickGrips
The Count-to-4 grip is a variation of Standard Grip, where the tip segment of the thumb bends inward, instead of extending flat to secure both chopsticks.
We dispel the false dichotomy of "crossed" vs "parallel" - an outdated way to classify chopstick grips. We propose Under Swing and Sideway Swing instead.
The Righthand Rule grip is named after the right-hand rule used in mathematics and physics, for its semblance to the the axes of the rule.