r2qkbnr/4pppp/1p6/n1pp4/2BP1N2/4P3/PPPQ1P1P/R1B1K2R b KQkq - 1 10
FEN state: r2qkbnr/4pppp/1p6/n1pp4/2BP1N2/4P3/PPPQ1P1P/R1B1K2R b KQkq - 1 10 ; Best move: a5c4
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at e7, black pawn at f7, black pawn at g7 and black pawn at h7. Black pawn at b6. Black knight at a5, black pawn at c5 and black pawn at d5. White bishop at c4, white pawn at d4 and white knight at f4. White pawn at e3. White pawn at a2, white pawn at b2, white pawn at c2, white queen at d2, white pawn at f2 and white pawn at h2. White rook at a1, white bishop at c1, white king at e1 and white rook at h1. White kingside, white queenside, black kingside and black queenside castles are available. Half move number is 1. Full move number is 10. Black to move.