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Interactive diagrams. (Updated!) Diagrams that interactively show piece moves.[All Comments] [Add Comment or Rating]
💡📝H. G. Muller wrote on Mon, Jun 15, 2020 10:11 PM UTC:

I now also added shuffling to the standard diagram script. You just have to specify a parameter shuffle=... with a string of piece IDs, mentioning all the piece types you want shuffled. If you prefix one of the IDs with ! it will make sure the pieces of that type are equally distributed over the square shades. If there is a piece that has castling as one of its moves, and the pieces in the corners of the specified position are of the same type, it will make sure the castling piece ends up between the other two. (Better only use that when all shuffled pieces are on the same rank!) If you specified a symmetry in the diagram (e.g. symmetry=mirror) it will respect that symmetry; otherwise it shuffles black and white independently.

So all you have to do to turn a Diagram for FIDE into Chess960 is specify shuffle=N!BRQK .

Shuffling is triggered by pressing the 'Restart' button in the AI control bar. It then restarts from a new shuffle.

I rigged the Diagram in the Metamachy article to shuffle the Eagle, Lion, Queen and King.