1rbk3r/1p4p1/p1p1qp2/3np3/B2P1BP1/2PQ3P/1b3n1R/RN2K1N1 b Q - 1 23
FEN state: 1rbk3r/1p4p1/p1p1qp2/3np3/B2P1BP1/2PQ3P/1b3n1R/RN2K1N1 b Q - 1 23 ; Best move: f2d3
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at d8 and black rook at h8. Black pawn at b7 and black pawn at g7. Black pawn at a6, black pawn at c6, black queen at e6 and black pawn at f6. Black knight at d5 and black pawn at e5. White bishop at a4, white pawn at d4, white bishop at f4 and white pawn at g4. White pawn at c3, white queen at d3 and white pawn at h3. Black bishop at b2, black knight at f2 and white rook at h2. White rook at a1, white knight at b1, white king at e1 and white knight at g1. White queenside is the only castle move available. Half move number is 1. Full move number is 23. Black to move.