You may want to search for "shunting puzzles", such as those here: https://www.transum.org/Software/Shunting/Puzzles.asp https://www.transum.org/Software/Shunti

You may want to search for "shunting puzzles", such as those here: https://www.transum.org/Software/Shunting/Puzzles.asp https://www.transum.org/Software/Shunting/Puzzles.asp Every time my model train interest rises, I consider setting up a small layout for puzzles like these.