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Puzzle 56 solution - 30 parts

Further parts can be removed for a solution with 30 parts only:

  • Direct every second ball that enters the first bit of register A also via the second bit.

The bits are set up for the test with 2 x 3.

Remark 1: The set-up does not work for 3 x 3.

Remark 2: There may still be some optimization potential regarding number of balls used, as every third ball out of four balls is running down without reaching the registers.