rnbk1bn1/3p2r1/8/Qp1N2pp/2pPPpp1/PP5N/2PB3P/3RK2R b K - 0 21
FEN state: rnbk1bn1/3p2r1/8/Qp1N2pp/2pPPpp1/PP5N/2PB3P/3RK2R b K - 0 21 ; Best move: a8a5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at d8, black bishop at f8 and black knight at g8. Black pawn at d7 and black rook at g7. White queen at a5, black pawn at b5, white knight at d5, black pawn at g5 and black pawn at h5. Black pawn at c4, white pawn at d4, white pawn at e4, black pawn at f4 and black pawn at g4. White pawn at a3, white pawn at b3 and white knight at h3. White pawn at c2, white bishop at d2 and white pawn at h2. White rook at d1, white king at e1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 21. Black to move.