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Swap the white and the black figures.
wap the black and white knights in the fewest moves
Swap the white and the black figures.
Swap the white and the black figures.
You Win!
One more chess problem in the STEEPLECHASE series. With an opening in the middle and the tightly packed field, its board, resembling the "O" letter, is in fact a hard nut to crack. You will feel it from the very beginning, though that must not be a reason to give up!
12 chess knights with only two vacant cells available for a maneuver for a given turn - all combined present quite a challenge. Progressing step by step is the way to proceed here. After some tries and errors you will spot some key junctions which would give you necessary insights.
If you can solve it within 20 moves consider consider yourself a chess master. But don't be frustrated if you go well above that. The main goal here is to find any winning pathway.
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* This chess puzzle appeared in Serhiy Grabarchuk's "Age of Puzzles: Puzzle Fields" published by Puzzlium, Inc. in 2019.