rnbq1bnr/3k1p2/1p4p1/R2pp2p/3p2PP/1P3P1R/1NP1PKB1/2BQ2N1 b - - 1 21
FEN state: rnbq1bnr/3k1p2/1p4p1/R2pp2p/3p2PP/1P3P1R/1NP1PKB1/2BQ2N1 b - - 1 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 queen at d8, black bishop at f8, black knight at g8 and black rook at h8. Black king at d7 and black pawn at f7. Black pawn at b6 and black pawn at g6. White rook at a5, black pawn at d5, black pawn at e5 and black pawn at h5. Black pawn at d4, white pawn at g4 and white pawn at h4. White pawn at b3, white pawn at f3 and white rook at h3. White knight at b2, white pawn at c2, white pawn at e2, white king at f2 and white bishop at g2. White bishop at c1, white queen at d1 and white knight at g1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. Black to move.