r1b3nr/p2kb1p1/2n1pq1p/1pp5/1P1NPpP1/3P3P/PBP2P2/R2QKB1R b K - 1 16
FEN state: r1b3nr/p2kb1p1/2n1pq1p/1pp5/1P1NPpP1/3P3P/PBP2P2/R2QKB1R b K - 1 16 ; Best move: c5d4
The current state of the chess board is: Black rook at a8, black bishop at c8, black knight at g8 and black rook at h8. Black pawn at a7, black king at d7, black bishop at e7 and black pawn at g7. Black knight at c6, black pawn at e6, black queen at f6 and black pawn at h6. Black pawn at b5 and black pawn at c5. White pawn at b4, white knight at d4, white pawn at e4, black pawn at f4 and white pawn at g4. White pawn at d3 and white pawn at h3. White pawn at a2, white bishop at b2, white pawn at c2 and white pawn at f2. White rook at a1, white queen at d1, white king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 16. Black to move.