r4knr/p1p1n2p/b3p1p1/1pbq1p1P/3PPP2/1PP4N/P1NQ2P1/R1B1K2R b Q - 0 16
FEN state: r4knr/p1p1n2p/b3p1p1/1pbq1p1P/3PPP2/1PP4N/P1NQ2P1/R1B1K2R b Q - 0 16 ; Best move: d5e4
The current state of the chess board is: Black rook at a8, black king at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at c7, black knight at e7 and black pawn at h7. Black bishop at a6, black pawn at e6 and black pawn at g6. Black pawn at b5, black bishop at c5, black queen at d5, black pawn at f5 and white pawn at h5. White pawn at d4, white pawn at e4 and white pawn at f4. White pawn at b3, white pawn at c3 and white knight at h3. White pawn at a2, white knight at c2, white queen at d2 and white pawn at g2. White rook at a1, white bishop at c1, white king at e1 and white rook at h1. White queenside is the only castle move available. Half move number is 0. Full move number is 16. Black to move.