r1b2q1r/p1p2kb1/1p3pp1/2npP2p/B2PP1nP/N6N/PPP1Q1P1/1RB2K1R b - - 0 16
FEN state: r1b2q1r/p1p2kb1/1p3pp1/2npP2p/B2PP1nP/N6N/PPP1Q1P1/1RB2K1R b - - 0 16 ; Best move: c5a4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at f8 and black rook at h8. Black pawn at a7, black pawn at c7, black king at f7 and black bishop at g7. Black pawn at b6, black pawn at f6 and black pawn at g6. Black knight at c5, black pawn at d5, white pawn at e5 and black pawn at h5. White bishop at a4, white pawn at d4, white pawn at e4, black knight at g4 and white pawn at h4. White knight at a3 and white knight at h3. White pawn at a2, white pawn at b2, white pawn at c2, white queen at e2 and white pawn at g2. White rook at b1, white bishop at c1, white king at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 16. Black to move.