1rb2bn1/1n2k1pr/1p1qpp2/p1pp2Np/P1BPPPPP/1PP5/3B4/RN1QK1R1 b - - 2 21
FEN state: 1rb2bn1/1n2k1pr/1p1qpp2/p1pp2Np/P1BPPPPP/1PP5/3B4/RN1QK1R1 b - - 2 21 ; Best move: f6g5
The current state of the chess board is: Black rook at b8, black bishop at c8, black bishop at f8 and black knight at g8. Black knight at b7, black king at e7, black pawn at g7 and black rook at h7. Black pawn at b6, black queen at d6, black pawn at e6 and black pawn at f6. Black pawn at a5, black pawn at c5, black pawn at d5, white knight at g5 and black pawn at h5. White pawn at a4, white bishop at c4, white pawn at d4, white pawn at e4, white pawn at f4, white pawn at g4 and white pawn at h4. White pawn at b3 and white pawn at c3. White bishop at d2. White rook at a1, white knight at b1, white queen at d1, white king at e1 and white rook at g1. Both players have exhausted their castles. Half move number is 2. Full move number is 21. Black to move.