rnQ1k1nr/2p1qppB/b2b4/pp1pp3/3N1PPP/1P2P3/PBPPN2R/R4K2 b q - 2 20
FEN state: rnQ1k1nr/2p1qppB/b2b4/pp1pp3/3N1PPP/1P2P3/PBPPN2R/R4K2 b q - 2 20 ; Best move: a6c8
The current state of the chess board is: Black rook at a8, black knight at b8, white queen at c8, black king at e8, black knight at g8 and black rook at h8. Black pawn at c7, black queen at e7, black pawn at f7, black pawn at g7 and white bishop at h7. Black bishop at a6 and black bishop at d6. Black pawn at a5, black pawn at b5, black pawn at d5 and black pawn at e5. White knight at d4, white pawn at f4, white pawn at g4 and white pawn at h4. White pawn at b3 and white pawn at e3. White pawn at a2, white bishop at b2, white pawn at c2, white pawn at d2, white knight at e2 and white rook at h2. White rook at a1 and white king at f1. Black queenside is the only castle move available. Half move number is 2. Full move number is 20. Black to move.