r2k1r2/p2n1p1R/2p2n2/1p1p2p1/4BpP1/qPPPb3/4PP2/R3K1N1 b Q - 0 20
FEN state: r2k1r2/p2n1p1R/2p2n2/1p1p2p1/4BpP1/qPPPb3/4PP2/R3K1N1 b Q - 0 20 ; Best move: a3a1
The current state of the chess board is: Black rook at a8, black king at d8 and black rook at f8. Black pawn at a7, black knight at d7, black pawn at f7 and white rook at h7. Black pawn at c6 and black knight at f6. Black pawn at b5, black pawn at d5 and black pawn at g5. White bishop at e4, black pawn at f4 and white pawn at g4. Black queen at a3, white pawn at b3, white pawn at c3, white pawn at d3 and black bishop at e3. White pawn at e2 and white pawn at f2. White rook at a1, white king at e1 and white knight at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 20. Black to move.