r2qkb2/p3p3/n1p4r/1p3QpP/2b2P2/PnP5/RP2P1R1/1NB1KN2 b q - 0 21
FEN state: r2qkb2/p3p3/n1p4r/1p3QpP/2b2P2/PnP5/RP2P1R1/1NB1KN2 b q - 0 21 ; Best move: d8d5
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8 and black bishop at f8. Black pawn at a7 and black pawn at e7. Black knight at a6, black pawn at c6 and black rook at h6. Black pawn at b5, white queen at f5, black pawn at g5 and white pawn at h5. Black bishop at c4 and white pawn at f4. White pawn at a3, black knight at b3 and white pawn at c3. White rook at a2, white pawn at b2, white pawn at e2 and white rook at g2. White knight at b1, white bishop at c1, white king at e1 and white knight at f1. Black queenside is the only castle move available. Half move number is 0. Full move number is 21. Black to move.