1n2kb1r/r3p3/2q1bp2/BPp3pp/2PPp1PP/1P3P2/4P1B1/nR1K2NR b k - 0 21
FEN state: 1n2kb1r/r3p3/2q1bp2/BPp3pp/2PPp1PP/1P3P2/4P1B1/nR1K2NR b k - 0 21 ; Best move: c6d7
The current state of the chess board is: Black knight at b8, black king at e8, black bishop at f8 and black rook at h8. Black rook at a7 and black pawn at e7. Black queen at c6, black bishop at e6 and black pawn at f6. White bishop at a5, white pawn at b5, black pawn at c5, black pawn at g5 and black pawn at h5. White pawn at c4, white pawn at d4, black pawn at e4, white pawn at g4 and white pawn at h4. White pawn at b3 and white pawn at f3. White pawn at e2 and white bishop at g2. Black knight at a1, white rook at b1, white king at d1, white knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 0. Full move number is 21. Black to move.