3r1bnr/p2ppkp1/b4p2/qp5P/NP1p1P2/B2P3P/PRP1B3/2QK2NR b - - 0 21
FEN state: 3r1bnr/p2ppkp1/b4p2/qp5P/NP1p1P2/B2P3P/PRP1B3/2QK2NR b - - 0 21 ; Best move: a5a4
The current state of the chess board is: Black rook at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at d7, black pawn at e7, black king at f7 and black pawn at g7. Black bishop at a6 and black pawn at f6. Black queen at a5, black pawn at b5 and white pawn at h5. White knight at a4, white pawn at b4, black pawn at d4 and white pawn at f4. White bishop at a3, white pawn at d3 and white pawn at h3. White pawn at a2, white rook at b2, white pawn at c2 and white bishop at e2. White queen at c1, white king at d1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. Black to move.