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cso 257 raindrop selection 1
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by
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dustin
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PITER                             2023-05-11 12:07
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AS I UNDERSTAND CROSSING THE BOULDERS TO THE RIGHT IS POSSIBLE DUE TO OPEN BORDER? I MUST CONFESS THAT I'M NOT AS GOOD WITH UNDERSTANDING THIS CSO TRICKS :-(

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DUSTIN                            2023-05-11 19:29
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piter, INDEED THE OPEN BORDER MAKES IT POSSIBLE FOR ^ TO CROSS THE |||  FROM LEFT TO RIGHT, BUT ONLY VIA THE TOP ROW.   
  
IF ^ TRIES TO DI IT, HE WILL ALWAYS COME INTO A SITUATION LIKE THIS:  
  
Β  
.  
.  
Β  
^  
.  
Β  
.  
.  
Β  
  
NORMALLY, THE Β ABOVE ^ IS SCANNED BEFORE ^, MEANING THAT THE Β CRUSHES ^ BEFORE HE CAN ESCAPE.  
  
BUT IF OPEN BORDERS ARE INVOLVED AND IF ^ IS IN THE TOP ROW, THE SITUATION (TECHNICALLY) LOOKS LIKE THIS:  
^  
.  
.  
Β  
.  
.  
Β  
.  
.  
Β  
.  
.  
Β  
  
NOW THE DANGEROUS Β IS IN THE VERY BOTTOM ROW OF THE CAVE, SO THIS TIME, ^ IS SCANNED FIRST! SO ^ ESCAPES IN TIME BEFORE THE Β "NOTICES" HIM.

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DUSTIN                            2023-05-11 19:32
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THE THREE-SECONDS-FASTER SOLUTIONS PUZZLE ME, ACTUALLY :D

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DUSTIN                            2023-05-11 19:41
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AH OK :D

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PITER                             2023-05-12 09:23
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dustin THANKS FOR EXPLANATION. THIS IS PROBABLY DUE TO SCAN ORDER.

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DUSTIN                            2023-05-12 22:28
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INDEED piter :D ACTUALLY "CSO" MEANS "CAVE SCANNING ORDER". IF I RECALL CORRECTLY, IT WAS shredder WHO USED THE ABBREVIATION "CSO" FIRST, AFTER I HAD UPLOADED THE FIRST FEW CAVES OF THIS SERIES :)  
  
MORE CSO EFFECTS WHICH ARE USED IN THIS CAVE:  
\ THE FACT THAT ^ CAN MOVE THROUGH THE FALLING ||| FROM RIGHT TO LEFT (EVEN WITHOUT USING OPEN BORDER)  
\ THE FACT THAT Π CAN BE PUSHED OVER EMPTY SPACE FROM LEFT TO RIGHT (BUT NOT VICE VERSA).