r1b2bn1/ppp1kppr/4p2p/3p4/NnBNPqP1/PP1P4/1BP2P2/R2QK1R1 b Q - 4 13
FEN state: r1b2bn1/ppp1kppr/4p2p/3p4/NnBNPqP1/PP1P4/1BP2P2/R2QK1R1 b Q - 4 13 ; Best move: b4c6
The current state of the chess board is: Black rook at a8, black bishop at c8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at b7, black pawn at c7, black king at e7, black pawn at f7, black pawn at g7 and black rook at h7. Black pawn at e6 and black pawn at h6. Black pawn at d5. White knight at a4, black knight at b4, white bishop at c4, white knight at d4, white pawn at e4, black queen at f4 and white pawn at g4. White pawn at a3, white pawn at b3 and white pawn at d3. White bishop at b2, white pawn at c2 and white pawn at f2. White rook at a1, white queen at d1, white king at e1 and white rook at g1. White queenside is the only castle move available. Half move number is 4. Full move number is 13. Black to move.