r1b2br1/p1pkn2p/n3p1p1/3p1p2/2pPQPP1/PP2P2q/2NKB2P/R1B4R b - - 0 16
FEN state: r1b2br1/p1pkn2p/n3p1p1/3p1p2/2pPQPP1/PP2P2q/2NKB2P/R1B4R b - - 0 16 ; Best move: d5e4
The current state of the chess board is: Black rook at a8, black bishop at c8, black bishop at f8 and black rook at g8. Black pawn at a7, black pawn at c7, black king at d7, black knight at e7 and black pawn at h7. Black knight at a6, black pawn at e6 and black pawn at g6. Black pawn at d5 and black pawn at f5. Black pawn at c4, white pawn at d4, white queen at e4, white pawn at f4 and white pawn at g4. White pawn at a3, white pawn at b3, white pawn at e3 and black queen at h3. White knight at c2, white king at d2, white bishop at e2 and white pawn at h2. White rook at a1, white bishop at c1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 16. Black to move.