n1b1kb1r/2qp3p/2P4P/2Q1pp2/ppP1N3/1P2P3/P2NK1PP/R1B2B1R b k - 3 21
FEN state: n1b1kb1r/2qp3p/2P4P/2Q1pp2/ppP1N3/1P2P3/P2NK1PP/R1B2B1R b k - 3 21 ; Best move: f8c5
The current state of the chess board is: Black knight at a8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black queen at c7, black pawn at d7 and black pawn at h7. White pawn at c6 and white pawn at h6. White queen at c5, black pawn at e5 and black pawn at f5. Black pawn at a4, black pawn at b4, white pawn at c4 and white knight at e4. White pawn at b3 and white pawn at e3. White pawn at a2, white knight at d2, white king at e2, white pawn at g2 and white pawn at h2. White rook at a1, white bishop at c1, white bishop at f1 and white rook at h1. Black kingside is the only castle move available. Half move number is 3. Full move number is 21. Black to move.