This was Strijbos' IPP 41 exchange puzzle, designed by Jean Claude Constantin.
The objective is to place the coloured rods so that the number of spaces between any pair of the same colour is given by its number.
Challenge 1: Place 2 rods each matching the colours from Red (0) through Purple (8) in the middle circle.
Challenge 2: Place all rods in the outer circle according to the assignment.
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