r1bk1bnr/pp1npQpp/B1p5/P2p4/1P1q3P/4R3/1BPP1PP1/4K1NR b - - 9 21
FEN state: r1bk1bnr/pp1npQpp/B1p5/P2p4/1P1q3P/4R3/1BPP1PP1/4K1NR b - - 9 21 ; Best move: d4b2
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black knight at d7, black pawn at e7, white queen at f7, black pawn at g7 and black pawn at h7. White bishop at a6 and black pawn at c6. White pawn at a5 and black pawn at d5. White pawn at b4, black queen at d4 and white pawn at h4. White rook at e3. White bishop at b2, white pawn at c2, white pawn at d2, white pawn at f2 and white pawn at g2. White king at e1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 9. Full move number is 21. Black to move.