r1bqkrn1/p2p1p1p/2p4b/1p2p1p1/1B6/1P1PP2N/PP2KPPP/R1QN1B1R b q - 1 16
FEN state: r1bqkrn1/p2p1p1p/2p4b/1p2p1p1/1B6/1P1PP2N/PP2KPPP/R1QN1B1R b q - 1 16 ; Best move: g5g4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8, black rook at f8 and black knight at g8. Black pawn at a7, black pawn at d7, black pawn at f7 and black pawn at h7. Black pawn at c6 and black bishop at h6. Black pawn at b5, black pawn at e5 and black pawn at g5. White bishop at b4. White pawn at b3, white pawn at d3, white pawn at e3 and white knight at h3. White pawn at a2, white pawn at b2, white king at e2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white queen at c1, white knight at d1, white bishop at f1 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.