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EventHorizon last won the day on November 19 2020
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Groundhog in a Hole  Yet Again
EventHorizon replied to EventHorizon's question in New Logic/Math Puzzles

#s of Combinations and Permutations of lines?
EventHorizon replied to Laubarr's question in New Logic/Math Puzzles
Some maximum permutations/combinations Some code (yay for global variables.... yeah... i was lazy) code also attached. main.cpp Example usage 
#s of Combinations and Permutations of lines?
EventHorizon replied to Laubarr's question in New Logic/Math Puzzles
So people don't need to register for an account at mathhelpboards.com to see those images... 

Shared solution to odd numbered grid totals
EventHorizon replied to Donald Cartmill's question in New Logic/Math Puzzles
Looks like a variation of the Siamese method for constructing nodd magic squares. 
Burning Rope Question (only one rope)
EventHorizon replied to matohak's question in New Logic/Math Puzzles
How about... 
Groundhog in a Hole  Yet Again
EventHorizon replied to EventHorizon's question in New Logic/Math Puzzles
While the hole that the groundhog starts in is unknown, it is one specific hole and its movements are as described. No matter what hole it starts in, given its described movement, the strategy given will eventually find it. You make it seem like the groundhog can teleport just because it's starting hole was unknown. Given your "about 17 holes outside" example, it would take just one or two (depending on parity) rounds of area clearing/expansion to get it. It does not matter that there are more holes outside the area, it will eventually be trapped and caught. 
Groundhog in a Hole  Yet Again
EventHorizon replied to EventHorizon's question in New Logic/Math Puzzles
My thoughts and solutions: 
Groundhog in a Hole  Yet Again
EventHorizon replied to EventHorizon's question in New Logic/Math Puzzles
You got it. Well done. I'll post my solutions later. 
Groundhog in a Hole  Yet Again
EventHorizon replied to EventHorizon's question in New Logic/Math Puzzles
Unfortunately, that does not work for the known parity case. Notice day 4 checks even holes, and day 5 also checks even holes. So days 58 are checking the wrong parity. Fixing this, the numbers change such that day 4k+x checks hole 4k+y, so the groundhog can escape by fleeing away from hole 0. 
Groundhog in a Hole  Yet Again
EventHorizon replied to EventHorizon's question in New Logic/Math Puzzles
There is no end to start from. Every hole has an infinite number of holes on both sides of it. And, yes, both you and the groundhog are immortal. Your friend, not so much. Luckily, you'll always be able to enlist a member of his posterity to help check one hole each day, so close enough. 
Groundhog in a Hole  Yet Again
EventHorizon replied to EventHorizon's question in New Logic/Math Puzzles
Perhaps this question will help move things along... 
Groundhog in a Hole  Yet Again
EventHorizon replied to EventHorizon's question in New Logic/Math Puzzles
Can anyone find the groundhog using less than 5 hunters?