1q3bn1/1b2kppr/r1pp4/Pp5p/3Np2P/2PP2R1/P3PPP1/RNB1KB2 b Q - 3 16
FEN state: 1q3bn1/1b2kppr/r1pp4/Pp5p/3Np2P/2PP2R1/P3PPP1/RNB1KB2 b Q - 3 16 ; Best move: a6a5
The current state of the chess board is: Black queen at b8, black bishop at f8 and black knight at g8. Black bishop at b7, black king at e7, black pawn at f7, black pawn at g7 and black rook at h7. Black rook at a6, black pawn at c6 and black pawn at d6. White pawn at a5, black pawn at b5 and black pawn at h5. White knight at d4, black pawn at e4 and white pawn at h4. White pawn at c3, white pawn at d3 and white rook at g3. White pawn at a2, white pawn at e2, white pawn at f2 and white pawn at g2. White rook at a1, white knight at b1, white bishop at c1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 3. Full move number is 16. Black to move.