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  • \$\begingroup\$ What's wrong with R F2 U3? \$\endgroup\$ Commented Jan 21, 2015 at 12:37
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    \$\begingroup\$ I just want to make sure, that everybody has the same preconditions. If I would allow U3, than you could simply cast the suffix into a digit. \$\endgroup\$ Commented Jan 21, 2015 at 12:47
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    \$\begingroup\$ I'm more used to the notation that uses T-Top, B-Bottom, and P-Posterior (back). People probably just liked seeing the sequence R2 D2. \$\endgroup\$ Commented Jan 21, 2015 at 15:30
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    \$\begingroup\$ @mbomb007 I can understand T for top, but I've never seen P for posterior and I wouldn't understand its meaning were it not for your comment... \$\endgroup\$ Commented Jan 21, 2015 at 16:17
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    \$\begingroup\$ @mbomb007 I have seen that notation too, but it is neither as common or as old as the original Singmaster notation, and I don't know why people want to mess with the original. Although David Singmaster (as far as I know) did not mention it, I have observed that all faces are perfectly consistent and with no clashes if considered as directions rather than positions. That is F(orward), B(ackward), L(eft), R(ight), U(p), D(own) \$\endgroup\$ Commented Jan 21, 2015 at 19:04