crabmouse wrote:

... One problem I have is what to do with the dual puzzles. I usually try to solve the A puzzle (the one on the left) by itself and I only use the second puzzle if I get stuck on the first. What I have found is that for many of these, the A puzzle is a really excellent puzzle that I enjoyed solving on its own. Combining the two puzzles is usually much less interesting...

Hi, crabmouse, iy you are more interested in this subject, perhaps you can find useful this topic (in the Section "Solving strategies and tips"):

viewtopic.php?f=3&t=1007At that time, in 2017, I tried to demonstrate, that "always" a twin puzzle could be solved by doing one of them, the left or the right side, and that both must have a unique solution, with the possible exception of the

**fm 0** twins, as commented there...