1rb2bnr/1ppq4/n1kPp1pp/8/1p3p2/1PPB1PP1/PBQP3P/2R1K1NR b K - 1 21
FEN state: 1rb2bnr/1ppq4/n1kPp1pp/8/1p3p2/1PPB1PP1/PBQP3P/2R1K1NR b K - 1 21 ; Best move: d7d6
The current state of the chess board is: Black rook at b8, black bishop at c8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at b7, black pawn at c7 and black queen at d7. Black knight at a6, black king at c6, white pawn at d6, black pawn at e6, black pawn at g6 and black pawn at h6. Black pawn at b4 and black pawn at f4. White pawn at b3, white pawn at c3, white bishop at d3, white pawn at f3 and white pawn at g3. White pawn at a2, white bishop at b2, white queen at c2, white pawn at d2 and white pawn at h2. White rook at c1, white king at e1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 21. Black to move.