r2qkbr1/1bpp2pp/5p2/pp2p3/PQ2PnP1/5P2/1PPPN2P/R1B1KB1R b q - 1 15
FEN state: r2qkbr1/1bpp2pp/5p2/pp2p3/PQ2PnP1/5P2/1PPPN2P/R1B1KB1R b q - 1 15 ; Best move: f8b4
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8, black bishop at f8 and black rook at g8. Black bishop at b7, black pawn at c7, black pawn at d7, black pawn at g7 and black pawn at h7. Black pawn at f6. Black pawn at a5, black pawn at b5 and black pawn at e5. White pawn at a4, white queen at b4, white pawn at e4, black knight at f4 and white pawn at g4. White pawn at f3. White pawn at b2, white pawn at c2, white pawn at d2, white knight at e2 and white pawn at h2. White rook at a1, white bishop at c1, white king at e1, 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 15. Black to move.