rn1k1b1r/1b1p2p1/p1p1p3/q4pn1/PP1N2p1/2PP4/3BP2P/1R1QKBNR b - - 3 21
FEN state: rn1k1b1r/1b1p2p1/p1p1p3/q4pn1/PP1N2p1/2PP4/3BP2P/1R1QKBNR b - - 3 21 ; Best move: a5e5
The current state of the chess board is: Black rook at a8, black knight at b8, black king at d8, black bishop at f8 and black rook at h8. Black bishop at b7, black pawn at d7 and black pawn at g7. Black pawn at a6, black pawn at c6 and black pawn at e6. Black queen at a5, black pawn at f5 and black knight at g5. White pawn at a4, white pawn at b4, white knight at d4 and black pawn at g4. White pawn at c3 and white pawn at d3. White bishop at d2, white pawn at e2 and white pawn at h2. White rook at b1, white queen at d1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 3. Full move number is 21. Black to move.