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2014-07-30 00:56 nesdori  
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Some remarks for solving this type of caves with enclosed flys: an enclosed fly tries to turn in every direction one by one and it takes 4 frames to do a full rotation. after 4 frames the same sequence starts over again. If cave fps (frames per second) is 7 (like in this one) a same state gets repeated after 4 full seconds. So, if it's safe to release a fly from a certain direction when the timer ticks down from x to x-1 it's also safe to release another fly from the same direction exactly 4 seconds later. I'm utilizing this fact in my solution. I'm releasing the first fly when the timer ticks down from 242 to 241, then next one 4 seconds later (238-&gt;237) and so on. The safe timeframe to release a fly is two successive frames (0.286 seconds with fps 7) so a steady reaction time and finger is still required. it doesn't matter what the reaction/action time is but the rhythm should be steady with every release. It's of course possible to solve this cave by just randomly releasing flys. a probability of successful random release is 50% so on average it takes just 512 tries to solve this cave :)