This is basically my end game strategy for puzzles once all the parts with distinguishing patterns has been solved and you’re left with e.g. a bunch of blue sky

This is basically my end game strategy for puzzles once all the parts with distinguishing patterns has been solved and you’re left with e.g. a bunch of blue sky pieces. It’s a bit dull, especially the sorting st the beginning, but it gets satisfyingly faster as you near the end and the number of candidates gets progressively smaller.