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Last post wins!

pjk

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#29
I use Mefferts black and I think 7 second avg is possible... sub-6 is probably too, but that will take a lot of work.
 

pjk

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#31
Yeah, I can see the smaller the better for sure... but that doesn't mean that sub-7 isn't possible. You can say sub-5 is possible with the Russian ones... maybe??
 

pjk

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#33
Are the white ones more smooth, or smaller? What is so different about them compared to the Mefferts standards?

Also, Arnaud said he can do it in 14 moves or less.... can someone else do that and give an email? It takes me well over 14 moves.
 

AvGalen

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#35
http://www.geocities.com/jaapsch/puzzles/pyraminx.htm

11 moves is optimal, excluding the tips. So 15 moves is optimal. I guess I never got one of the 32 scrambles (out of 933.120) that requires 11 moves.

Finding an 11 moves solution (excluding tips) is relatively easy. Just try it 10 times and you will probably get 4 or 5 already.
 

pjk

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#36
So is the way Jaap describes and the way Matyas describes (http://www.rubikkocka.hu/angol/pages/piraminxeng.htm) the shortest solutions? When you did 14/15 moves, is that how you did it? I currently build up 1 layer, then permute the remaining 3. Is that a longer method?

Arnaud, can you type up a quick example solve please and describe what you see, etc. Thanks
 

AvGalen

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#37
Doing 1 layer and then permutate the remaining 3 "edges" is obviously not going to be the shortest solution in most cases and neither is the "keyhole" method that is also quite popular.

Simply try connecting edges to their centers without creating "flipped edges". Even if you use layer-by-layer that would give you a really short solution. With a layer-method you have a chance of about 1/6 to skip the 2nd layer. If you think about how you put in the last edge that will become 1/3 and by avoiding "flipped edges" it will become 1/2.

If I have the time I will create a sample solve, but I don't have time to learn notation for Pyraminx this week.
 
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