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2025-02-15 10:44 dustin  
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the cso puzzle for february! :d  
  
it's released as untested, but i did test it at lower speed to ensure that it works. so it's definitely solvable!  
  
this one requires, beside the right theoretical plan, a considerable amount of keyboard control! :d

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2025-02-15 12:23 DarkStoorM  
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This is my favorite fly trick! :D

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2025-02-15 13:13 nesdori  
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 darkstoorm , that is not a surprise; sometimes you do voluntary races against flies ;)

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2025-02-15 18:35 dustin  
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:d

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2025-02-19 02:51 heywood  
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is it time to post solutions? i love these but i can rarely figure them out. :)

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2025-02-19 12:35 DarkStoorM  
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Sure :D

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2025-02-21 10:26 dustin  
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glad to read that  heywood  :)  
  
the cso effect here is of course the way how Κ brings the Ζ and the Η over the g-walls.  
  
| for the Ζ, Κ can just let it follow him without gap.  
  
| for the Η, this solution would not work because if a fly touches Κ from his left side, the fly would be scanned first and kill Κ. so here, the tricky stop-and-go solution is required. (this would also work for the Ζ, so for the Ζ two solutions are possible.)