rn1nk1r1/1p1b1pb1/3p3p/2p1p1p1/1PP1N3/5PPN/PB1PP1BP/R3K2R b q - 1 16
FEN state: rn1nk1r1/1p1b1pb1/3p3p/2p1p1p1/1PP1N3/5PPN/PB1PP1BP/R3K2R b q - 1 16 ; Best move: c5b4
The current state of the chess board is: Black rook at a8, black knight at b8, black knight at d8, black king at e8 and black rook at g8. Black pawn at b7, black bishop at d7, black pawn at f7 and black bishop at g7. Black pawn at d6 and black pawn at h6. Black pawn at c5, black pawn at e5 and black pawn at g5. White pawn at b4, white pawn at c4 and white knight at e4. White pawn at f3, white pawn at g3 and white knight at h3. White pawn at a2, white bishop at b2, white pawn at d2, white pawn at e2, white bishop at g2 and white pawn at h2. White rook at a1, white king at e1 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.