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How many moves to a 2x2x2 block?   Message List  
Reply | Forward Message #13163 of 42554 |


Hi Lars (P),

I have been trying to shift from a simple cross to a 2x2x2 block to
start my solution on the 3x3x3. Quite frankly I'm not very good at
it in a 15 second inspection period. Given as much time as I need I
can eventually figure it out in a reasonable number of moves
(roughly 8-10 QTM if no c/e pair to start, 6-8 QTM if c/e pair from
heaven). Doubtless I will eventually become better at this with
practice. But my question is: do you have any stats (or semi-
complete-stats, or just a 'gut feeling') for how many QTM it should
take to unite a 2x2x2 block? I know a cross can ALWAYS be solved in
8 HTM but what about a 2x2x2 - the same numer of pieces but a
different combo and a (3 orientation) piece amongst (2 orientation)
pieces. Are my stats way off base? Do I need to work on radically
improving my solve strategy or only my recognition time???

Yours,

Rob








Sat Oct 9, 2004 9:04 am

futuese
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Message #13163 of 42554 |
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Hi Lars (P), I have been trying to shift from a simple cross to a 2x2x2 block to start my solution on the 3x3x3. Quite frankly I'm not very good at it in a 15...
Rob Butler
futuese
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Oct 9, 2004
9:06 am

I haven't seen any real numbers, but my gut feeling is that the best average you can humanly get is 6 moves. I'd be really surprised if that was more than half...
Lars Petrus
gorimek
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Oct 9, 2004
7:48 pm

Thanks for the tips Lars! The tip concerning C/E pairs 'joined up wrong' is really helpful for instances where there isn't already a C/E pair joined up. That...
Rob Butler
futuese
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Oct 10, 2004
7:47 pm

Hey! This could surely be calculated by a computer. Looking at the 2x2x2 block it is 3 centers (static), 3 edges and 1 corner. If one fixes the position of the...
Per Kristen Fredlund
aspiring_to_...
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Oct 10, 2004
8:04 pm

Hmm ... That will yield an upper bound. Selected block might not be to the optimal one. Ooops ... but it's an idea nevertheless. -Per ... possible ... one...
Per Kristen Fredlund
aspiring_to_...
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Oct 10, 2004
9:26 pm

From my experience : Place corner + Edge : 1-3 move Place Edge to center : 2-3 move Place corner/edge + edge : 1-3 moves Place last edge : 2-3 moves Thats...
pathfinder_netstorm
pathfinder_n...
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Oct 11, 2004
3:38 pm

253440 is really nothing for a computer, so a simple BFS starting from the solved state would give the answer. That's only for a fixed 2x2 (i.e. chosen...
Stefan Pochmann
stefan_pochmann
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Oct 12, 2004
1:02 pm
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