Cherchez la FEN

(Dall-e creation)

What is the minimum number of moves that must be played in a chess game so that the FEN of the position reached has exactly 8 numbers – these numbers being 1, 2, 3, 4, 5, 6, 7 and 8 (not necessarily in this order)?

Answer below, in yellow, at #64

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#64

After Black's 6th move we can reach this position, for instance:

rnbqkbnr/ppp5/7p/3p4/8/PP6/2PPPPPP/RN1QKBNR
1.b3 e5 2.Bb2 f6 3.Bxe h5 4.Bxf d6 5.Bxg BxB 6.a3 Bf8

The hereunder FEN shows the same 8 integers – but appearing in their natural order (position reached after Black's 10th move: can you beat that?)
1n2k3/rppb4/5ppr/p6p/7q/8/PPPPPPPP/RNBQKBNR


(Apronus Chess Diagram Editor)

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