Sudoku update

Following my recent post on measuring queue-lengths by Sudoku, I have some revised statistics to share, which may affect the positioning of the queue markers.

Tonights simple, medium and difficult sudokus took four, seven and 21 minutes respectively, taking the average sudoku time for the two nights down to 12m 34s. So the Post Office’s "One sudoku to go" sign needs to be moved to stand beside the 20th queue occupant.

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