Where countries are mentioned or can be inferred, posts 3, 7, 9, 10, 16, 20, 51 and 52 talk implicitly about the US (eg Let ten million people - still only 3% of the population in #7) or explicitly about the US (eg all links in #52 are to US sources). No other country is mentioned (apart from...
US Deaths from Covid-19 to 10 Jan 2021: 365,597 CDC COVID Data Tracker
There is no sign of the death rate even slowing - it's now over 3,000 deaths per day.
US soldiers killed in Vietnam war: 58,220 US National Archives
At the current death rate this equates to about 20 days of Covid...
I have dug out Singmaster's booklet. It is a soft cover pamphlet from 1980 stapled together with 62 pages of densely packed information and, if still available, well worth getting.
The four centre pages describe the solution I posted above. His nomenclature is good: the faces colours to...
IIRC the cube operates in one of 12 non-intersecting cycles. You can traverse a cycle but you cannot jump to a different cycle by manipulation.
For example, take a solved cube. Disassemble it and reassemble it with one corner spun (two ways) or an edge piece flipped. You are now in a...
I still have my genuine Rubik's Cube from back then. I could get one face solved but then got stuck - no internet those days - until I discovered David Singmaster's wonderful little book. It had a method using only two move-sequences which, once one face had been solved, were sufficient to...