I've been very lockdown lazy over the past while, and have done a lot of reading, snoozing, eating and watching TV rather than anything productive such as modelling.
That said, I'm almost through the 1930 year of "The Railway Magazine", and quite wonderful it is, too.
I've also been working on rules for this tuning fork puzzle, as I couldn't find any online after a fair bit of a search. Inglenook puzzles get a lot of interest, but the smaller tuning fork seems to be overlooked.
There are six items of rolling stock, all different, and four possible loads (so far), with goods either coming into or leaving the yard from one of four locations. This can lead to a fair bit of activity without getting very complicated.
Ground rules are that the locomotive always starts from the left hand end of the fiddlestick, and wagons are only allowed to be lifted off when clear of the yard boundary, ie over the fiddlestick joint. If a wagon is in the place needed by another for a move, it has to go into an empty space on either siding, if there aren't any only then is it allowed to be shunted off scene and removed from operations until needed again.
If a wagon is "parked" on scene and needed for a good inwards move it is collected by the engine and moved to the end of the fiddlestick for loading.
Coupler loops are always to the left hand end and are only on one end of each wagon. The locomotive has no loops.
I downloaded a free dice app onto the half dead phone I use as a camera, and devised the following:
by , on Flickr
The first four throws of the virtual dice decide on goods in or out, which wagon is needed, what the load is (if its one of the three flats or the two plank open), and where it has to go. Shunting then takes place to sort this out, then when that is done a final throw decides if the engine needs fuel or can return to the start.
I've tested this a fair bit today, and it seems to work