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2021-02-12 10:45 nesdori  
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my solution free. it's a bit annoying to first go to the right side and then back to the left. i also tried multiple ways to simply free flies at the bottom and then go to the left side and collect all \ in one pass going to the right. but unfortunately the best i got was 17\ :)

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2021-02-12 11:21 DarkStoorM  
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I also tried many different ways, starting from each firefly from the left side, I always missed the \ on the second ffly stack by 2 or 1 frame :P Maybe if the ffly stack was a bit closer...

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2021-02-12 12:09 nesdori  
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oh well, i tried the one pass strategy a few more times and it's not that difficult after all.. :)

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2021-02-12 13:10 DarkStoorM  
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Wow, nice. The clue was actually on the right side! :D