r2qkb2/N1p2pr1/1p3np1/P2pp2p/5Pb1/2P1K2B/P2PP2P/1RBQ2NR b q - 1 15
FEN state: r2qkb2/N1p2pr1/1p3np1/P2pp2p/5Pb1/2P1K2B/P2PP2P/1RBQ2NR b q - 1 15 ; Best move: f8c5
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8 and black bishop at f8. White knight at a7, black pawn at c7, black pawn at f7 and black rook at g7. Black pawn at b6, black knight at f6 and black pawn at g6. White pawn at a5, black pawn at d5, black pawn at e5 and black pawn at h5. White pawn at f4 and black bishop at g4. White pawn at c3, white king at e3 and white bishop at h3. White pawn at a2, white pawn at d2, white pawn at e2 and white pawn at h2. White rook at b1, white bishop at c1, white queen at d1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 15. Black to move.