r1b1k2r/1pp3p1/n1npp3/p4p2/Pb2NP1p/2P2KP1/1P1PP1B1/NRBQ3R b q - 1 16
FEN state: r1b1k2r/1pp3p1/n1npp3/p4p2/Pb2NP1p/2P2KP1/1P1PP1B1/NRBQ3R b q - 1 16 ; Best move: f5e4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black rook at h8. Black pawn at b7, black pawn at c7 and black pawn at g7. Black knight at a6, black knight at c6, black pawn at d6 and black pawn at e6. Black pawn at a5 and black pawn at f5. White pawn at a4, black bishop at b4, white knight at e4, white pawn at f4 and black pawn at h4. White pawn at c3, white king at f3 and white pawn at g3. White pawn at b2, white pawn at d2, white pawn at e2 and white bishop at g2. White knight at a1, white rook at b1, white bishop at c1, white queen at d1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 16. Black to move.