[Retros] A single red unit

Éric Angelini eric.angelini at skynet.be
Sun Oct 25 07:05:51 EDT 2020


Hello Retro fans,

rnbqkbnr/1ppppppp/8/8/8/8/1PPPPPPP/RNBQKBNR

Say a « red » unit is a chess unit that moved more than once during the game.

What is the minimum number of moves needed to reach the above FEN diagram where only one of the 30 units is red?

Best,
É.





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