What is your typical sorting process?
I did a 1k puzzle to unwind last night and decided not to do any sorting and just flip pieces over. I was prompted to try this by a comment on this sub that asked me why I bothered sorting if I dislike it so much.
It turns out not sorting was so much worse than doing a crude prelim sort. Rooting through the box looking for pieces? Hated it and it was murder on my neck. After piecing together one small section I went back through the loose pieces and sorted into 3 piles.
It was a massive difference and had the puzzle done in no time after that. So there's the answer as to why I'll always do a prelim color sort with as few piles as I can work with.
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For context, my typical sort process is to toss pieces in roughly 3-6 heaping piles as I flip the pieces over (based on color or pattern), and even that minimal effort is the part of the puzzling process I dislike because I want to get straight to piecing.
I'll only sort by shape if I'm working on something like a huge sky section that's all the same color and pretty flat without varying shades.