r3qb1r/pp1n1kpp/4pp2/N2p4/2PPbN2/1P3P1P/P3PnP1/RQB1KBR1 b Q - 1 17
FEN state: r3qb1r/pp1n1kpp/4pp2/N2p4/2PPbN2/1P3P1P/P3PnP1/RQB1KBR1 b Q - 1 17 ; Best move: e4b1
The current state of the chess board is: Black rook at a8, black queen at e8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at b7, black knight at d7, black king at f7, black pawn at g7 and black pawn at h7. Black pawn at e6 and black pawn at f6. White knight at a5 and black pawn at d5. White pawn at c4, white pawn at d4, black bishop at e4 and white knight at f4. White pawn at b3, white pawn at f3 and white pawn at h3. White pawn at a2, white pawn at e2, black knight at f2 and white pawn at g2. White rook at a1, white queen at b1, white bishop at c1, white king at e1, white bishop at f1 and white rook at g1. White queenside is the only castle move available. Half move number is 1. Full move number is 17. Black to move.