4kb1r/rp3p2/nq5p/p2n2pQ/PB1P1N2/2P4b/2R3PP/1N1K1BR1 b k - 1 21
FEN state: 4kb1r/rp3p2/nq5p/p2n2pQ/PB1P1N2/2P4b/2R3PP/1N1K1BR1 b k - 1 21 ; Best move: d5f4
The current state of the chess board is: Black king at e8, black bishop at f8 and black rook at h8. Black rook at a7, black pawn at b7 and black pawn at f7. Black knight at a6, black queen at b6 and black pawn at h6. Black pawn at a5, black knight at d5, black pawn at g5 and white queen at h5. White pawn at a4, white bishop at b4, white pawn at d4 and white knight at f4. White pawn at c3 and black bishop at h3. White rook at c2, white pawn at g2 and white pawn at h2. White knight at b1, white king at d1, white bishop at f1 and white rook at g1. Black kingside is the only castle move available. Half move number is 1. Full move number is 21. Black to move.