r1bq1r2/p1Np2k1/n1Rbpp2/1P3n2/3P2Pp/8/1BP1P1P1/3K1BNR b - - 0 21
FEN state: r1bq1r2/p1Np2k1/n1Rbpp2/1P3n2/3P2Pp/8/1BP1P1P1/3K1BNR b - - 0 21 ; Best move: f5e3
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8 and black rook at f8. Black pawn at a7, white knight at c7, black pawn at d7 and black king at g7. Black knight at a6, white rook at c6, black bishop at d6, black pawn at e6 and black pawn at f6. White pawn at b5 and black knight at f5. White pawn at d4, white pawn at g4 and black pawn at h4. White bishop at b2, white pawn at c2, white pawn at e2 and white pawn at g2. White king at d1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. Black to move.