Originally posted by BigDoggProblem [fen]8/4b2k/ppppppp1/8/3r3n/1PPq4/2rP3P/1N2K1Nb w - - 0 21[/fen]
Position after Black's 20th move. How did the game go?
I'm afraid it is not about the 21st and 22nd moves of the game, but about moves 1 up to 20 😕
Black's options to reach this position in 20 moves are limited, because the LEAST number of moves is 20:
- 7 pawn moves (at least 6 of them are captures)
- 3 bishop moves (Bf8-e7 and Bc8-b7 and Bb7-(xR)a1
- 3 knight moves Ng8 - h6 (more likely than via e7) - f5 - h4
- the knight on b8 has not moved and was captured on b8
- 2 king moves including 0-0
With the d-file temporarily open:
- 1 queen move
- 2 rook moves (after the castling) Rf8 - d8 (more lilely than via f4) - d4
- 2 more rook moves Ra8 - (x) a2 - c2