2r1kb1r/p2np1p1/1pp2p2/1b3n1p/1Pp4P/BQ2P1P1/P2PBP2/RN1K2NR b k - 0 16
FEN state: 2r1kb1r/p2np1p1/1pp2p2/1b3n1p/1Pp4P/BQ2P1P1/P2PBP2/RN1K2NR b k - 0 16 ; Best move: c4b3
The current state of the chess board is: Black rook at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at a7, black knight at d7, black pawn at e7 and black pawn at g7. Black pawn at b6, black pawn at c6 and black pawn at f6. Black bishop at b5, black knight at f5 and black pawn at h5. White pawn at b4, black pawn at c4 and white pawn at h4. White bishop at a3, white queen at b3, white pawn at e3 and white pawn at g3. White pawn at a2, white pawn at d2, white bishop at e2 and white pawn at f2. White rook at a1, white knight at b1, white king at d1, white knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 0. Full move number is 16. Black to move.