rn3bnr/4kp2/b2pp3/1pp1PqPp/2P4p/Np3N2/PP1P2K1/R1BQ1B2 b - - 1 21
FEN state: rn3bnr/4kp2/b2pp3/1pp1PqPp/2P4p/Np3N2/PP1P2K1/R1BQ1B2 b - - 1 21 ; Best move: f5g4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at f8, black knight at g8 and black rook at h8. Black king at e7 and black pawn at f7. Black bishop at a6, black pawn at d6 and black pawn at e6. Black pawn at b5, black pawn at c5, white pawn at e5, black queen at f5, white pawn at g5 and black pawn at h5. White pawn at c4 and black pawn at h4. White knight at a3, black pawn at b3 and white knight at f3. White pawn at a2, white pawn at b2, white pawn at d2 and white king at g2. White rook at a1, white bishop at c1, white queen at d1 and white bishop at f1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. Black to move.