1q2kb1r/rBp1np1p/3pp2n/p3Pp2/2PP1B2/N2b3P/P6R/RQ2K1N1 b - - 2 21
FEN state: 1q2kb1r/rBp1np1p/3pp2n/p3Pp2/2PP1B2/N2b3P/P6R/RQ2K1N1 b - - 2 21 ; Best move: d3b1
The current state of the chess board is: Black queen at b8, black king at e8, black bishop at f8 and black rook at h8. Black rook at a7, white bishop at b7, black pawn at c7, black knight at e7, black pawn at f7 and black pawn at h7. Black pawn at d6, black pawn at e6 and black knight at h6. Black pawn at a5, white pawn at e5 and black pawn at f5. White pawn at c4, white pawn at d4 and white bishop at f4. White knight at a3, black bishop at d3 and white pawn at h3. White pawn at a2 and white rook at h2. White rook at a1, white queen at b1, white king at e1 and white knight at g1. Both players have exhausted their castles. Half move number is 2. Full move number is 21. Black to move.