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The Black Hole




If this was a minigolf hole, you can't reach B from A. Ever.

If this was a room lined with mirrors, and you lit a candle at point A, you can't see it from B, not even reflected. 


Update: I guess I didn't explain this all the way through. You can't reach B from A with just one stroke, there's no direct line between them, and there is no way to bounce the ball (assuming perfect conditions). Thanks to Ben for pointing this obvious error. 

Comments

  1. Sure you can. Putt from A downwards halfway to the wall. Putt right until the ball is directly beneath B. Putt up. Hole in 3. There might also be a hole in one angle between A and B, but I'd have to measure to be sure.

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  2. Sorry, I meant to say you can't hit it with one shot, even if you bounce it. The line between A and B means you can't shoot it directly, it would hit as a corner.

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  3. I realized that must have been what you meant a little while after posting. An interesting mathematical problem would be to try to find optimal configurations like this with various constraints in place.

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  4. Yup, what drives me nuts is I understand the mini golf part of the problem 100%, but I can't wrap my head around the light source issue.

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